WO1997022176A1 - Starter system for a direct drive generator - Google Patents

Starter system for a direct drive generator Download PDF

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Publication number
WO1997022176A1
WO1997022176A1 PCT/US1996/019392 US9619392W WO9722176A1 WO 1997022176 A1 WO1997022176 A1 WO 1997022176A1 US 9619392 W US9619392 W US 9619392W WO 9722176 A1 WO9722176 A1 WO 9722176A1
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WO
WIPO (PCT)
Prior art keywords
signal
generator
coupled
responsively
storage means
Prior art date
Application number
PCT/US1996/019392
Other languages
French (fr)
Inventor
John R. Lindbery
Original Assignee
Solar Turbines Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Solar Turbines Incorporated filed Critical Solar Turbines Incorporated
Publication of WO1997022176A1 publication Critical patent/WO1997022176A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/08—Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation

Definitions

  • This invention relates generally to a power generator system, and more particularly, to a starter for the generator system which utilizes the generator to start the system.
  • Direct drive systems may be used to generate electrical power.
  • a direct drive system including a gas turbine engine may be adapted to generate 3 phase electrical power.
  • the turbine engine drives a generator directly attached to or mounted on the turbine shaft.
  • the starter system typically included a starter motor, gearing, and control circuitry.
  • the starter system adds cost and complexity which reduces the reliability of the system.
  • the present invention is aimed at solving one or more of the problems presented above.
  • Fig. 1 is a block diagram of a direct drive power generator system
  • Fig. 2 is a block diagram of a direct drive power generator system with a starter system according to an embodiment of the present invention
  • Fig. 3 is a flow diagram of the operation of the starter system, according to an embodiment of the present invention.
  • Fig. 4 is a flow diagram of the operation of the starter system, according to an other embodiment of the present invention.
  • an apparatus for starting an engine-generator system is provided.
  • the system is adapted to provide electrical power to a load.
  • the system includes a turbine engine coupled to a generator, a rectifier connected to the generator output, a storage means coupled to the rectifier, a power inverter coupled between the storage means and the load, and an inverter controller.
  • the apparatus includes a circuit for de- coupling the load from the system. The apparatus controls the generator to drive the turbine and start the system.
  • a method for starting an engine-generator system is provided.
  • the system is adapted to provide electrical power to a load.
  • the system includes a turbine directly coupled to a generator, a rectifier coupled to the generator, a storage means coupled to the rectifier, and a power inverter coupled between the storage means and the load.
  • the method includes the steps of decoupling the load from the system and controlling the generator to drive the turbine to start the engine.
  • the present invention or starter system 202 is adapted to start a system 102 for providing electrical power to a load 104.
  • the system 102 includes a turbine engine or turbine 106, a generator 114 coupled to the turbine 106, a rectifier 116 coupled to the generator 114, a storage means 118 coupled to the rectifier 116, a power inverter 120 coupled between the storage means 118 and the load 104, and an inverter control means 122.
  • the system 102 provides 3-phase power to the load 104.
  • the generator 114 is coupled to the turbine 106 by a drive shaft 112.
  • the inverter control means 122 is implemented on a microprocessor based controller.
  • the controller may be programmed to perform other functions which are immaterial to the present invention, e.g., controlling the engine during operation.
  • the turbine 106 via the 3 phase generator 114 and 3 phase rectifier 116 charges the storage means 118.
  • the inverter control means 122 provides a pulse width modulated signal to the 3 phase power inverter 120 to apply the desired power to the load 104.
  • a suitable system 102 and operation thereof are disclosed in U.S. Patents 5,400,237 and 5,404,089 issued 21 March 1995 and 4 April 1995, respectively, which are hereby incorporated by reference.
  • the starter system 202 is adapted to drive the generator 114 as a motor to start the turbine engine 106.
  • a de-coupling means 204 de-couples the load 104 from the system 102 during the starting operation.
  • the de-coupling means 204 includes a circuit breaker. During the starting operation, the circuit breaker remains open. After the engine starts and engine speed increases to a running speed, the circuit breaker is closed.
  • a starter control means 206 is coupled to the system 102.
  • the starter control means 206 controls the generator 114 to drive the turbine 106 to starting speed. This is accomplished via the 3 phase power inverter 120, as described below.
  • the inverter control means 122 includes means for receiving a start command and for responsively producing a starter signal and applying a pulse width modulated signal to the 3 phase power inverter 120.
  • the power inverter 120 supplies current to the generator 114 in order to drive the generator 114 as a motor to turn the drive shaft 112.
  • the turbine engine 106 starts once the drive shaft 112 is driven by the generator 114 to a starting speed.
  • the generator in the start mode, assists the turbine engine up to the starting speed, e.g. approximately a 60% cut out speed.
  • the starter control means 206 is turned off by the inverter control means 122 and the current from the power inverter 120 is decoupled from the generator 114.
  • the turbine engine 106 is allowed to come up to full speed, i.e., running speed. Once the turbine engine 106 attains full speed, the load may be applied.
  • the starter control means 206 includes a battery 208, an inductor 210 coupled to the battery 208, an IGBT transistor 216 connected between the inductor 210 and the battery 208, and a flyback diode 212 connected between the transistor 216 and the storage means 118.
  • the storage means 118 includes means for producing a DC link voltage level signal. The DC link voltage is indicative of the status of the storage means 118.
  • the starter control means 206 also includes a coupling means 220, a feedback means 218, and a transistor drive means 214.
  • the coupling means 220 receives the starter signal and responsively couples the output of the power inverter 120 to the generator 114 and generates a start enable signal.
  • the coupling means 220 includes a normally open starter contacter.
  • the feedback means 218 receives the DC link voltage level signal and the start enable signal and responsively produces a feedback signal.
  • the feedback signal is indicative of the status of the storage means 118 and is transmitted to the drive means 214 only when the start enable signal is being received.
  • the drive means 214 is coupled to the transistor 216 and receives the feedback signal and responsively drives the IGBT transistor 216.
  • a means 222 senses the position of a rotor of the generator 114 and responsively produces a rotor position signal.
  • the power inverter 120 generates a synchronized output voltage in response to the feedback signal.
  • the inverter control means 122 includes means for receiving the rotor position signal and the output voltage feedback signal.
  • the inverter control means 122 includes a phase locked loop circuit responsive to the output voltage feedback signal and the rotor position signal.
  • the starter system 202 charges the storage means 118 from the battery 208 and applies a pulse width modulated signal to the 3 phase power inverter 120.
  • the power inverter 120 applies a driving current to the generator 114 in order to rotate the drive shaft 112.
  • the magnitude of current supplied to the generator 114 is a function of the duty cycle of the pulse width modulated signal.
  • a delay is built into the system to allow the turbine engine speed to increase to a predetermined percentage of running speed, for example, 90% of running speed.
  • the load 104 is coupled to the system 102 in control block 306.
  • a first decision block 402 the START command is waited for. If a START command is received, control proceeds to a fourth control block 404.
  • the load is de ⁇ coupled from the system 202.
  • the output of the power inverter is coupled to the generator.
  • the position of the rotor in the generator 114 is sensed and a rotor position signal is generated.
  • control block 410 the output voltage of the power inverter is sensed and compared to the rotor position signal by means of the phase locked loop circuit to assure that the inverter is synchronized with the starter/generator rotor.
  • the storage means 118 is charged via the starter control means 206.
  • the engine is started by delivering a pulse width modulated signal to the power inverter 120 to control the generator 114 to start the turbine engine 414.
  • the present invention or apparatus 202 is adapted to start a system 102 which generates electrical power by driving the generator 114 of the system 102 and starting the turbine engine 106.
  • the system 102 includes a inverter control means 122 which is used in normal operation of the system 102. Performance of the START operation occurs after receipt of a START command.
  • the load 104 is first de-coupled from the system 102.
  • the starter control means 206 includes a battery and circuitry which charges the capacitors in the storage means 118.
  • the storage means 118 is normally employed during inverter operation in the generate mode of operation.
  • the output of the power inverter is coupled to the generator 114.
  • the inverter control means 122 generates a pulse width modulated signal which drives the power inverter.
  • the power inverter output a drive current to drive the generator 114.
  • the magnitude of the driving current is dependent upon the duty cycle of the pulse width modulated (PWM) signal.
  • the inverter control means modulates the pulse width modulated signal as a function of the position of the rotor and the output voltage feedback signal. In one embodiment, the duty cycle of the PWM signal starts at a low frequency and ramps up. This allows the generator to orient itself.
  • a DC voltage is applied to the generator 114 to position the generator at an initial position prior to application of a rotating field to the starter generator thereby initiating rotation of the shaft.
  • the starting control means 206 senses the status of the storage means and generates a feedback signal.
  • the magnitude of the feedback signal is used to drive the transistor 216 in order to control charging of the storage means 118.
  • the current from the 3 phase power inverter will drive the generator as a motor and rotate the drive shaft 112. Once the drive shaft 112 reaches a predetermined speed, the turbine engine 106 will start. Once the turbine engine 106 starts, output of the power inverter is de-coupled from the generator and the starter control means 206 is disabled. Engine speed will now increase to the desired operating speed range. Once the engine speed reaches a second predetermined speed, for example, 90% of running speed, power can be supplied to the load 104 and the load 104 and system 102 can be re-coupled.
  • a second predetermined speed for example, 90% of running speed
  • the position of the starter/generator rotor is sensed to assure that the inverter drive power applied to the starter/generator during the start mode of operation is synchronized with the rotation of the rotor. This is done through the use of the phase locked loop circuit.
  • the charging of the storage means is determined by sensing the DC voltage and varying the pulse width applied to the transistor 216 so as to maintain the appropriate DC link voltage during the start operation.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

An apparatus (202) and method for starting a system (102). The system (102) provides electrical power to a load (104). The system (102) includes a turbine engine (106), a generator (114) coupled to the turbine engine (106), a rectifier (116) coupled to the generator (114), a storage means (118) coupled to the rectifier (116), a power inverter (120) coupled between the storage means (118) and the load (104), and an inverter controller (122). The apparatus (202) includes a circuit (204) for de-coupling the load (104) from the system (102). The apparatus (202) and method control the generator (114) to drive the turbine engine (106) and start the system (102).

Description

Description
Starter System for a Direct Drive Generator
Technical Field
This invention relates generally to a power generator system, and more particularly, to a starter for the generator system which utilizes the generator to start the system.
Background of the Invention
Direct drive systems may be used to generate electrical power. For example, a direct drive system including a gas turbine engine may be adapted to generate 3 phase electrical power. In such a system, the turbine engine drives a generator directly attached to or mounted on the turbine shaft.
Previously, in order to start turbine systems a separate starter system was required. The starter system typically included a starter motor, gearing, and control circuitry. The starter system adds cost and complexity which reduces the reliability of the system.
The present invention is aimed at solving one or more of the problems presented above.
Brief Description of the Drawings
Fig. 1 is a block diagram of a direct drive power generator system; Fig. 2 is a block diagram of a direct drive power generator system with a starter system according to an embodiment of the present invention;
Fig. 3 is a flow diagram of the operation of the starter system, according to an embodiment of the present invention; and Fig. 4 is a flow diagram of the operation of the starter system, according to an other embodiment of the present invention.
Disclosure of he invention
In one aspect of the present invention, an apparatus for starting an engine-generator system is provided. The system is adapted to provide electrical power to a load. The system includes a turbine engine coupled to a generator, a rectifier connected to the generator output, a storage means coupled to the rectifier, a power inverter coupled between the storage means and the load, and an inverter controller. The apparatus includes a circuit for de- coupling the load from the system. The apparatus controls the generator to drive the turbine and start the system.
In another aspect of the present invention, a method for starting an engine-generator system is provided. The system is adapted to provide electrical power to a load. The system includes a turbine directly coupled to a generator, a rectifier coupled to the generator, a storage means coupled to the rectifier, and a power inverter coupled between the storage means and the load. The method includes the steps of decoupling the load from the system and controlling the generator to drive the turbine to start the engine.
Best Mode for Carrying Out the Invention
With reference to Figs. 1 and 2, the present invention or starter system 202 is adapted to start a system 102 for providing electrical power to a load 104. With particular reference to Fig. 1, the system 102 includes a turbine engine or turbine 106, a generator 114 coupled to the turbine 106, a rectifier 116 coupled to the generator 114, a storage means 118 coupled to the rectifier 116, a power inverter 120 coupled between the storage means 118 and the load 104, and an inverter control means 122.
In the preferred embodiment, the system 102 provides 3-phase power to the load 104. The generator 114 is coupled to the turbine 106 by a drive shaft 112.
In the preferred embodiment, the inverter control means 122 is implemented on a microprocessor based controller. Preferably, the controller may be programmed to perform other functions which are immaterial to the present invention, e.g., controlling the engine during operation.
During operation of the system 102, the turbine 106 via the 3 phase generator 114 and 3 phase rectifier 116 charges the storage means 118. The inverter control means 122 provides a pulse width modulated signal to the 3 phase power inverter 120 to apply the desired power to the load 104. A suitable system 102 and operation thereof are disclosed in U.S. Patents 5,400,237 and 5,404,089 issued 21 March 1995 and 4 April 1995, respectively, which are hereby incorporated by reference.
With specific reference to Fig. 2, the power generating system 102 of Fig. 1 is shown with the additional elements of the present invention. The starter system 202 is adapted to drive the generator 114 as a motor to start the turbine engine 106.
A de-coupling means 204 de-couples the load 104 from the system 102 during the starting operation. In the preferred embodiment, the de-coupling means 204 includes a circuit breaker. During the starting operation, the circuit breaker remains open. After the engine starts and engine speed increases to a running speed, the circuit breaker is closed.
A starter control means 206 is coupled to the system 102. The starter control means 206 controls the generator 114 to drive the turbine 106 to starting speed. This is accomplished via the 3 phase power inverter 120, as described below.
The inverter control means 122 includes means for receiving a start command and for responsively producing a starter signal and applying a pulse width modulated signal to the 3 phase power inverter 120. The power inverter 120 supplies current to the generator 114 in order to drive the generator 114 as a motor to turn the drive shaft 112.
The turbine engine 106 starts once the drive shaft 112 is driven by the generator 114 to a starting speed. The generator, in the start mode, assists the turbine engine up to the starting speed, e.g. approximately a 60% cut out speed. Once the turbine engine 106 has started, the starter control means 206 is turned off by the inverter control means 122 and the current from the power inverter 120 is decoupled from the generator 114. The turbine engine 106 is allowed to come up to full speed, i.e., running speed. Once the turbine engine 106 attains full speed, the load may be applied. In the preferred embodiment, the starter control means 206 includes a battery 208, an inductor 210 coupled to the battery 208, an IGBT transistor 216 connected between the inductor 210 and the battery 208, and a flyback diode 212 connected between the transistor 216 and the storage means 118. The storage means 118 includes means for producing a DC link voltage level signal. The DC link voltage is indicative of the status of the storage means 118. The starter control means 206 also includes a coupling means 220, a feedback means 218, and a transistor drive means 214.
The coupling means 220 receives the starter signal and responsively couples the output of the power inverter 120 to the generator 114 and generates a start enable signal. In the preferred embodiment, the coupling means 220 includes a normally open starter contacter.
The feedback means 218 receives the DC link voltage level signal and the start enable signal and responsively produces a feedback signal. The feedback signal is indicative of the status of the storage means 118 and is transmitted to the drive means 214 only when the start enable signal is being received. The drive means 214 is coupled to the transistor 216 and receives the feedback signal and responsively drives the IGBT transistor 216.
A means 222 senses the position of a rotor of the generator 114 and responsively produces a rotor position signal. The power inverter 120 generates a synchronized output voltage in response to the feedback signal. The inverter control means 122 includes means for receiving the rotor position signal and the output voltage feedback signal. In the preferred embodiment, the inverter control means 122 includes a phase locked loop circuit responsive to the output voltage feedback signal and the rotor position signal. With reference to Fig. 3, the operation of the starter system 202 is shown according to a first embodiment. In a first control block 302 the load is de-coupled from the system 202. In a second control block, the starter system 202 charges the storage means 118 from the battery 208 and applies a pulse width modulated signal to the 3 phase power inverter 120. The power inverter 120 applies a driving current to the generator 114 in order to rotate the drive shaft 112. The magnitude of current supplied to the generator 114 is a function of the duty cycle of the pulse width modulated signal.
Once the turbine engine 106 has reached cutout speed, the current applied to the generator 114 is discontinued and engine speed is allowed to increase to the operating speed range. In a third control block 306, a delay is built into the system to allow the turbine engine speed to increase to a predetermined percentage of running speed, for example, 90% of running speed. After the predetermined engine speed has been reached, the load 104 is coupled to the system 102 in control block 306.
With reference to Fig. 4, the operation of the starter system 202 according to a second embodiment is shown. In a first decision block 402, the START command is waited for. If a START command is received, control proceeds to a fourth control block 404. In the fourth control block 404 the load is de¬ coupled from the system 202. In a fifth control block 406, the output of the power inverter is coupled to the generator. In a sixth control block 408, the position of the rotor in the generator 114 is sensed and a rotor position signal is generated. In a seventh control block 410, the output voltage of the power inverter is sensed and compared to the rotor position signal by means of the phase locked loop circuit to assure that the inverter is synchronized with the starter/generator rotor. In an eighth control block 412, the storage means 118 is charged via the starter control means 206. In a ninth control block 414, the engine is started by delivering a pulse width modulated signal to the power inverter 120 to control the generator 114 to start the turbine engine 414.
Industrial Applicability
With respect to the drawings and in operation, the present invention or apparatus 202 is adapted to start a system 102 which generates electrical power by driving the generator 114 of the system 102 and starting the turbine engine 106.
The system 102 includes a inverter control means 122 which is used in normal operation of the system 102. Performance of the START operation occurs after receipt of a START command. In order to start the system 102, the load 104 is first de-coupled from the system 102.
The starter control means 206 includes a battery and circuitry which charges the capacitors in the storage means 118. The storage means 118 is normally employed during inverter operation in the generate mode of operation.
The output of the power inverter is coupled to the generator 114. The inverter control means 122 generates a pulse width modulated signal which drives the power inverter. The power inverter output a drive current to drive the generator 114. The magnitude of the driving current is dependent upon the duty cycle of the pulse width modulated (PWM) signal. The inverter control means modulates the pulse width modulated signal as a function of the position of the rotor and the output voltage feedback signal. In one embodiment, the duty cycle of the PWM signal starts at a low frequency and ramps up. This allows the generator to orient itself.
In a second embodiment, a DC voltage is applied to the generator 114 to position the generator at an initial position prior to application of a rotating field to the starter generator thereby initiating rotation of the shaft.
The starting control means 206 senses the status of the storage means and generates a feedback signal. The magnitude of the feedback signal is used to drive the transistor 216 in order to control charging of the storage means 118.
The current from the 3 phase power inverter will drive the generator as a motor and rotate the drive shaft 112. Once the drive shaft 112 reaches a predetermined speed, the turbine engine 106 will start. Once the turbine engine 106 starts, output of the power inverter is de-coupled from the generator and the starter control means 206 is disabled. Engine speed will now increase to the desired operating speed range. Once the engine speed reaches a second predetermined speed, for example, 90% of running speed, power can be supplied to the load 104 and the load 104 and system 102 can be re-coupled. In general, the position of the starter/generator rotor is sensed to assure that the inverter drive power applied to the starter/generator during the start mode of operation is synchronized with the rotation of the rotor. This is done through the use of the phase locked loop circuit.
The charging of the storage means is determined by sensing the DC voltage and varying the pulse width applied to the transistor 216 so as to maintain the appropriate DC link voltage during the start operation.
Other aspects, objects, and features of the present invention can be obtained from a study of the drawings, disclosure, and the appended claims.

Claims

Claims
1. An apparatus (202) for starting a system (102) for providing electrical power to a load (104) , the system (102) having a turbine engine (106) , a generator (114) coupled to the turbine engine (106) , a rectifier (116) coupled to the generator (114) , a storage means (118) coupled to the rectifier (116) , a power inverter (120) coupled between the storage means (118) and the load (104) , and an inverter control means (122) , comprising: means (204) for de-coupling the load (104) from the system (102) ; and, starter control means (206) , coupled to the system (102) for controlling the generator (114) to drive the turbine engine (106) and start the turbine engine (106) .
2. An apparatus (202), as set forth in claim 1, wherein the storage means (118) includes means for producing a link voltage signal.
3. An apparatus (202), as set forth in claim 1, wherein the storage means (118) includes means for producing a DC link voltage signal and the inverter control means (122) includes means for receiving a start command and for responsively producing a starter signal and applying a pulse width modulated signal to the 3 phase power inverter (120) .
4. An apparatus (202), as set forth in claim 3, wherein said starter control means (206) includes:
a battery (208) ; an inductor (210) coupled to said battery
(208) an IGBT transistor (216) connected between said inductor (210) and said battery (208) ; a flyback diode (212) connected between said transistor (216) and the storage means (118) ; means (220) for receiving said starter signal and responsively coupling the output of the power inverter (120) to the generator (114) and generating a start enable signal; and means (218) for receiving said DC link voltage signal and said start enable signal and responsively producing a feedback signal; means (214) , coupled to said IGBT transistor (216) , for receiving said feedback signal and responsively driving said IGBT transistor (216) .
5. An apparatus (202) , as set forth in claim 1, wherein the storage means (118) includes means for producing a DC link voltage signal and the inverter control means (122) includes means for receiving a start command and for responsively producing a starter signal and applying a pulse width modulated signal to the power inverter (120) and wherein said starter control means (206) includes: a battery (208) ; an inductor (210) coupled to said battery (208); a transistor (216) connected between said inductor (210) and said battery (208) ; a flyback diode (212) connected between said transistor (216) and the storage means (118) ; means (220) for receiving said starter signal and responsively coupling the output of the power inverter (120) to the generator (114) and generating a start enable signal; means (218) for receiving said link voltage signal and said start enable signal and responsively producing a feedback signal; means (214) for receiving said feedback signal and responsively driving said transistor (216) .
6. An apparatus (202), as set forth in claim 1, including means (222) for sensing the position of a rotor of the generator (114) and responsively producing a rotor position signal, wherein the power inverter (120) includes means for generating an output voltage feedb< k signal, and said inverter control means (122) includes means for receiving said rotor position signal and said output voltage feedback signal.
7. An apparatus (202), as set forth in claim 6, wherein said inverter control means (122) includes a phase locked loop circuit responsive to said output voltage feedback signal and said rotor position signal.
8. A method for starting a system (102), the system (102) adapted to provide electrical power to a load (104), the system (102) having a turbine engine (106) , a generator (114) coupled to the turbine engine (106) , a rectifier (116) coupled to the generator (114) , a storage means (118) coupled to the rectifier (116), and a power inverter (120) coupled between the storage means (118) and the load (104), comprising: decoupling the load (104) from the system (102) ; and controlling the generator (114) to drive and start the engine turbine (106) .
9. A method, as set forth in claim 8, including the step of coupling the load (104) to the system after engine speed has reached a predetermined percentage of running speed.
10. A method for starting a system (102), the system (102) adapted to provide electrical power to a load (104) , the system (102) having a turbine engine (106) , a generator (114) coupled to the turbine engine (106) , a rectifier (116) coupled to the generator (114) , a storage means (118) coupled to the rectifier (116) , and a power inverter (120) coupled between the storage means (118) and the load (104) , comprising: receiving a start command and responsively generating a start signal; receiving said start signal and responsively coupling the output of the power inverter (120) to the generator (114); sensing the position of a rotor within the generator (114) and responsively producing a rotor position signal; sensing output voltage of the power inverter (120) and responsively producing an output voltage feedback signal; charging the storage means (118) ; receiving said output voltage feedback signal and said rotor position signal and responsively delivering a pulse-width modulated signal to the power inverter (120) to control the generator (114) to start the turbine engine (106) .
PCT/US1996/019392 1995-12-12 1996-12-05 Starter system for a direct drive generator WO1997022176A1 (en)

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US57132795A 1995-12-12 1995-12-12
US08/571,327 1995-12-12

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US8866334B2 (en) 2010-03-02 2014-10-21 Icr Turbine Engine Corporation Dispatchable power from a renewable energy facility
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US9051873B2 (en) 2011-05-20 2015-06-09 Icr Turbine Engine Corporation Ceramic-to-metal turbine shaft attachment
US10094288B2 (en) 2012-07-24 2018-10-09 Icr Turbine Engine Corporation Ceramic-to-metal turbine volute attachment for a gas turbine engine
CN109849818A (en) * 2019-03-14 2019-06-07 江苏迈吉易威电动科技有限公司 A kind of Vehicular auxiliary-power unit starting-generating system

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