Reversing circuit of direct current motor
A DC motor and commutation circuit technology, applied in the direction of DC motor rotation control, etc., can solve problems such as short circuit and current rise, and achieve the effects of high reliability, low cost and simple structure
Pending Publication Date: 2019-02-15
中奕智创医疗科技有限公司
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Problems solved by technology
[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a DC motor commutation circuit, which solves the problem that the two control terminals of the controller in the prior art are turned on at the same time, causing a short-term current to rise sharply, or even a short circuit
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[0018] Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .
[0019] A DC motor commutation circuit, such as figure 1 As shown, it includes a first steering circuit, a second steering circuit, a first delay driving circuit, a second delay driving circuit, and a steering shutdown circuit. The motor commutation control terminal is connected to the input terminal of the first delay driving circuit. The output end of a delay driving circuit is connected to the DC motor through the first steering circuit, the motor commutation control end is connected to the input end of the second delay driving circuit, and the output end of the second delay driving circuit is connected to the DC motor through the second steering cir...
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The invention provides a reversing circuit of a direct current motor. The reversing circuit comprises a first steering circuit, a second steering circuit, a first delay drive circuit, a second delay drive circuit and a steering turn-off circuit, wherein the reversing control end of the motor is connected with the input end of the first delay drive circuit; the output end of the first delay drive circuit is connected with the direct current motor through the first steering circuit; the reversing control end of the motor is connected with the input end of the second delay drive circuit; the output end of the second delay drive circuit is connected with the direct current motor through the second reversing circuit; the reversing control end of the motor is connected with the input end of thesteering turn-off circuit; and the output end of the steering turn-off circuit is connected with the direct current motor through the first steering circuit. According to the reversing circuit of thedirect current motor, by using the charging delay function of a first capacitor and a second capacitor, when the power supply direction of the direct current motor changes, the turn-on time of the novel reversing circuit is delayed appropriately, and simultaneously, an original steering circuit is turned off quickly, so that the problem of rapid rise of short-time current or even short circuit cannot occur for the steering circuit.
Description
technical field [0001] The invention relates to the technical field of motor control, in particular to a DC motor commutation circuit. Background technique [0002] DC motors are widely used in medical equipment, robots and other fields. In practical applications, DC motors generally encounter the problem of motor rotor rotation, that is, the rotor switches from clockwise rotation to counterclockwise rotation, or the rotor switches from counterclockwise rotation to clockwise rotation. The traditional control method generally uses different output terminals of controllers such as PLC or single-chip microcomputer to control the rotor to rotate clockwise or counterclockwise. When switching, one end stops working and the other end starts working to switch the rotation direction of the rotor. However, in the long-term operation of the controller, it is inevitable that the controller will restart or the program will run away. In this case, once the two control terminals are turne...
Claims
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IPC IPC(8): H02P7/03
CPCH02P7/03
Inventor 赵恩海宋佩邹庆华谭婷
Owner 中奕智创医疗科技有限公司