Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1997-04-15
1999-07-27
Martin, David
Electricity: motive power systems
Switched reluctance motor commutation control
318439, 318138, 361 33, 361 86, 361 91, H02K 2300
Patent
active
059295767
ABSTRACT:
A protection apparatus used in a brushless motor is arranged by a brushless motor; a commutation signal detecting unit for detecting a position of a movable member of the brushless motor; a speed detecting unit for detecting a rotation speed of the movable member of the brushless motor, involving a rotation direction thereof, in response to the detection signal outputted from the commutation signal detecting unit; and a drive circuit for producing a commutation signal used to drive the movable member of the brushless motor in response to the detection signal outputted from the commutation signal detecting unit and for driving the brushless motor based upon the commutation signal. The protection apparatus is further constructed of an output voltage instructing unit for supplying to the drive circuit, an output voltage instruction signal for instructing an output voltage of the drive circuit, which constitutes a drive voltage when the brushless motor is driven; a voltage limit level setting unit for setting an upper limit value of the output voltage of the drive circuit; and a voltage limiter unit for limiting the output signal of the output voltage instructing unit based on the setting value of the voltage limit level setting unit to thereby limit an upper limit value of the output voltage of the drive circuit.
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Fujisaki Yoshihiro
Takada Kazuyuki
Yasohara Masahiro
Martin David
Matsushita Electric - Industrial Co., Ltd.
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