Sampling circuit and sampling method for phase winding current of switched reluctance motor

A technology of switched reluctance motor and sampling circuit, which is applied in the direction of electronic commutator, etc., can solve the problems of Hall sensor phase difference, temperature characteristics and frequency response characteristics, and achieve real-time sampling, high sensitivity and low price.
CN102045015AActive Publication Date: 2011-05-04NANTONG SHENGYANG ELECTRIC CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANTONG SHENGYANG ELECTRIC CO LTD
Publication Date
2011-05-04

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Abstract

The invention discloses a sampling circuit and sampling method for phase winding current of a switched reluctance motor. The sampling circuit is connected with a phase winding of the switched reluctance motor in series, and comprises a current sampling circuit, a filter circuit and a processor, wherein the current sampling circuit also comprises a sampling resistor; under the working modes of excitation and follow current of the switched reluctance motor, the sampling resistor converts the phase winding current into a voltage signal, and the voltage signal is transferred to the processor for analysis after being processed by the filter circuit; and under the backflow working mode, no current passes through the sampling resistor, the phases are changed in the switched reluctance motor, and the sampling processing step of the next phase winding current is carried out. The sampling circuit for the phase winding current of the switched reluctance motor has the characteristics of low price, strong practicality and high sensitivity, is nearly not influenced by environmental temperature, and can convert the phase winding current to the voltage signal without loss in real-time so as to achieve the real-time sampling of the winding phase current.
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Description

technical field

[0001] The invention discloses a motor control circuit and method, in particular to a sampling circuit and a sampling method for phase winding current of a switched reluctance motor. Background technique

[0002] The structure of the switched reluctance motor is simple and firm, the operation is reliable, and the efficiency is high. The inrush current phenomenon that occurs when the induction motor starts; the speed range is wide, the control is flexible, and the four-quadrant operation can be easily realized. It has strong regenerative braking capability and has high efficiency in a wide range of speed and power. It is conducive to energy saving and consumption reduction; it can work at extremely high speed; it can run without phase, and has strong fault tolerance. At present, the application of switched reluctance motors in military and civilian industries has achieved some results, but there are still some problems to be further studied and solved, mainly...

Claims

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