发明名称 |
Control system, electronically commutated motor system, draft inducer apparatus and method |
摘要 |
A control system and method for an electronically commutated motor having a stationary assembly with a plurality of winding stages for carrying a motor current in response to application of a voltage having a magnitude subject to variations, the motor further having a rotatable assembly. The control system is adapted to receive control pulses having a duty cycle which is a function of a desired operating torque or speed for the motor. The control system and method are responsive to the motor current for generating a pluse width modulated (PWM) series of pulses having a pulse repetition rate having a duty cycle which is a function of the duty cycle of the control pulses. The PWM series of pulses are supplied to the commutating circuit as a pulsed signal whereby the operating torque or speed of the motor is a function of the duty cycle of the control pulses and is substantially independent of variations in the magnitude of the applied voltage. The control system may be part of a draft inducer apparatus or method for use with a combustion chamber having an exhaust outlet including a fan for moving air through the exhaust outlet and thereby to induce a draft in the combustion chamber. A pressure sensor connected to the motor control apparatus may be located within the exhaust outlet.
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申请公布号 |
US5075608(A) |
申请公布日期 |
1991.12.24 |
申请号 |
US19900483329 |
申请日期 |
1990.02.20 |
申请人 |
ERDMAN, DAVID M.;BRATTOLI, MARK A. |
发明人 |
ERDMAN, DAVID M.;BRATTOLI, MARK A. |
分类号 |
B60H1/32;F23N3/08;F25B49/02;G05D23/19;H02K29/06;H02K29/10;H02P6/16;H02P6/18 |
主分类号 |
B60H1/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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