Switched reluctance starter/generator control system allowing operation with regenerative loads and electrical system em
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02P-001/46
출원번호
US-0315168
(1994-09-29)
발명자
/ 주소
Heglund William S. (Davis Junction IL) Ferreira Caio A. (Rockford IL)
출원인 / 주소
Sundstrand Corporation (Rockford IL 02)
인용정보
피인용 횟수 :
25인용 특허 :
0
초록▼
An electric power generating system comprises a switched reluctance machine, an inverter having a dc input/output coupled to a dc bus, switches responsive to switching control signals for coupling each of the machine\s phase windings to the dc bus, and diodes for cross-coupling each of the phase win
An electric power generating system comprises a switched reluctance machine, an inverter having a dc input/output coupled to a dc bus, switches responsive to switching control signals for coupling each of the machine\s phase windings to the dc bus, and diodes for cross-coupling each of the phase windings to the dc bus. A controller having a number of control inputs and outputs coupled to the inverter monitors the current flowing in the phase windings and the voltage level on the dc bus, and calculates a maximum and a minimum phase current control signal. The controller modulates the switching control signals to regulate the phase current within a range defined by these control signals to maintain the voltage level at a desired level. Upon calculating a positive phase current control signal, the controller generates switching control signals to enable switches at a fixed angle prior to alignment, and generates switching control signals to disable the switches at a fixed angle after alignment. In this way, the machine generates sufficient electric power to maintain the voltage level at the desired level. Upon calculating a negative phase current control signal, the controller generates switching control signals to enable the switches at a fixed angle prior to alignment, and generates switching control signals to disable one switch at a fixed angle prior to alignment. In this way, the machine dissipates sufficient electric power to maintain the voltage at the desired level.
대표청구항▼
A controller for a switched reluctance machine having a rotor drivably coupled to a prime mover by shaft means, and a stator having a first plurality of salient stator poles wound with phase windings, the rotor comprising a second plurality of salient rotor poles, the phase windings being coupled to
A controller for a switched reluctance machine having a rotor drivably coupled to a prime mover by shaft means, and a stator having a first plurality of salient stator poles wound with phase windings, the rotor comprising a second plurality of salient rotor poles, the phase windings being coupled to a dc bus by at least a first and a second switching means responsive to switching control signals, the windings further being cross coupled to the dc bus by at least a first and a second commutation means to allow current flow back when the switching means are disabled, comprising: means for sensing voltage on the dc bus, said voltage sensing means generating a voltage feedback signal proportional in magnitude to said voltage on the dc bus; means for sensing current flowing in the phase windings, said current sensing means generating a phase current feedback signal proportional in magnitude to said current flowing in the phase winding; means for resolving the position of the rotor, said rotor position resolving means generating an angular position feedback signal proportional to the angular displacement between a rotor pole and a stator pole; voltage control means responsive to said voltage feedback signal and a predetermined voltage command threshold for generating a variable maximum phase current control signal and a variable minimum phase current control signal, a fixed turn-on control signal and a fixed turn-off control signal; commutator control means responsive to said variable maximum phase current control signal, said variable minimum phase current control signal, said fixed turn-on control signal, said fixed turn-off control signal, said phase current feedback signal, and said angular position feedback signal for generating the switching control signals to modulate the switching means during a period from said fixed turn-on control signal to said fixed turn-off control signal, said commutator control means thereby regulating said phase current within a range defined by said variable maximum phase current control signal and said variable minimum phase current control signal, said voltage on the dc bus being maintained at a desired level thereby; and wherein said voltage control means, upon generating a positive maximum phase current control signal, generates said fixed turn-on control signal at a first fixed angle prior to alignment of a rotor pole with a stator pole, and said fixed turn-off control signal at a second fixed angle after alignment of a rotor pole with a stator pole; and wherein said voltage control means, upon generating a negative maximum phase current control signal, generates said fixed turn-on control signal at a third fixed angle prior to alignment of a rotor pole with a stator pole, and said fixed turn-off control signal at a fourth fixed angle prior to alignment of a rotor pole with a stator pole.
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이 특허를 인용한 특허 (25)
Goldammer, Timothy; Le, Thuong; Miller, Jason; Wai, Jackson, Active high voltage bus bleed down.
William S. Heglund, Commutation apparatus and method for a four state sensorless switched reluctance machine system utilizing machine winding current sensing.
Sarlioglu, Bulent; Huggett, Colin E., Decoupling of cross coupling for floating reference frame controllers for sensorless control of synchronous machines.
Kumar Ajith Kuttannair (Erie PA) Stitt Thomas Detlor (Erie PA), Using sensed stator terminal voltages for determining alternator rotor position for cranking an engine.
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