Measuring method and detecting device for winding voltage of switched reluctance motor
A switched reluctance motor, winding voltage technology, applied in the direction of using digital measurement technology to measure and other directions, can solve the problems of unreliable work, high price, low practicability, etc., and achieves the effect of strong practicability and simple structure
Inactive Publication Date: 2010-06-09
NANTONG CHUNGUANG AUTOMATIC CONTROL EQUIP ENG +1
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Problems solved by technology
[0005] Technical problem: the purpose of the present invention is to solve the problems of unreliable work, high price and low practicability encountered in the existing voltage measurement using the voltage Hall sensor
Method used
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Embodiment Construction
[0016] The inventive method comprises the method principle of obtaining the magnitude and the direction of the winding voltage:
[0017] The present invention is described in conjunction with the accompanying drawings, taking the A-phase winding voltage as an example, the direction indicated by the arrow is the positive direction of the A-phase winding voltage:
[0018] Such as figure 1 As shown, when the transistors T1 and T2 are both turned on, the reluctance motor is in the state of double-conduction conduction. At this time, the power supply Udc, the transistor T1, the A-phase inductor, and the transistor T2 form a current loop. At this time, the winding voltage UA at both ends of the A-phase inductance is approximately equal to the value of the voltage Udc at both ends of the bus bar, and the direction is positive. At this time, the optocoupler 21 is turned on, and a turn-on signal is output to the single-chip microcomputer 3 .
[0019] Such as figure 2 As shown, when ...
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The invention discloses a measuring method and a detecting device for winding voltage of a switched reluctance motor. The method comprises the following steps of: measuring the virtual value of bus voltage through a proportional partial pressure sampling circuit to obtain the virtual value of the winding voltage when the switched reluctance motor is in a dual-pipe conduction working state and a CCC cut dual-pipe working state, and utilizing a forward and inverse voltage polarity detecting circuit of a winding to detect the direction of the winding voltage after the winding voltage passes through a single-pipe current-storing return circuit. The detecting device consists of a proportional partial pressure sampling circuit sequentially connected in series with the forward and inverse voltage polarity detecting circuit of the winding, a single-chip machine CPU and the single-pipe current-storing return circuit, wherein the proportional partial pressure sampling circuit is sequentially connected in series with the power supply end of the forward and inverse voltage polarity detecting circuit of the winding and then is connected with an external direct-current power supply. The detecting device has the advantages of simple structure and strong practicality.
Description
technical field [0001] The invention relates to a measurement method and a detection device for the winding voltage of a switched reluctance motor, which solves the problem of high price and instability of the existing measurement method, and belongs to the field of motor control motor winding voltage detection. Background technique [0002] The switched reluctance motor (SR motor) has simple and firm structure, reliable operation and high efficiency. Compared with the traditional AC and DC speed control system, the switched reluctance motor drive system (SRD) composed of it has many advantages, such as: starting torque Large, good low-speed performance, no inrush current phenomenon that occurs when the induction motor starts; wide speed range, flexible control, can easily realize four-quadrant operation, has strong regenerative braking ability, in a wide range of speed and power All have high efficiency, which is conducive to energy saving and consumption reduction; can wor...
Claims
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Inventor 时龙兴虞翠萍钟锐刁龙陆生礼
Owner NANTONG CHUNGUANG AUTOMATIC CONTROL EQUIP ENG