Forward and reversal rotation soft-starting braking controller for alternating current motor
A technology of brake controller and AC motor, which is applied in the direction of motor generator/starter, deceleration device of AC motor, starter of single multi-phase induction motor, etc. It can solve the problems of easy ablation of contactor contacts, mechanical and Problems such as short electrical life and complex mechanical actions can achieve the effects of increasing stability and anti-interference, increasing hardware costs, and simplifying circuits
Inactive Publication Date: 2012-09-19
刘志涛
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Problems solved by technology
Because the contacts of the contactor are easy to be ablated and the mechanical action is complicated, the mechanical and electrical life is short, and the wiring is complicated and the cost is high
Method used
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[0015] refer to Figure 1-4 , it includes a shell 1, inside the shell is a circuit board 2 with power input terminals, access motor output terminals and control terminals, the circuit board includes a microcontroller as the center, two bidirectional thyristors or four anti-parallel single Thyristor, rectifier bridge, phase-shift trigger circuit, digital tube display circuit, current detection circuit, command input isolation circuit, power supply circuit, miniature high-current relay and relay driver chip; the phase-shift trigger circuit in the circuit board is controlled by the microcontroller and It is connected to the trigger pole of the thyristor, and the cathode and anode of the thyristor are respectively connected to the power input terminal, the contact of the miniature high-current relay and the rectifier bridge; The contacts are respectively connected with the thyristor or the rectifier bridge and the output terminal; the microcontroller as the center in the circuit b...
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The invention relates to the technical field of motor controlling, relates to a forward and reversal rotation soft-starting braking controller for an alternating current motor and aims to solve the problems of impact current and abrasion of mechanic transmission components caused by the fact that the forward and reversal rotation and braking of existing alternating current motors are required to be respectively controlled and directly started. The controller comprises a casing and a circuit board, a microcontroller is arranged in the circuit board, a phase shift trigger circuit in the circuit board is controlled by the microcontroller and connected with a trigger electrode of a thyristor, a cathode of the thyristor is connected with a power input terminal, an anode of the thyristor is connected with a minisize large current relay contact and a rectifier bridge, a relay drive chip in the circuit board is controlled by the microcontroller and connected with a minisize large current relay coil, the minisize large current relay contact is respectively connected with the thyristor or the rectifier bridge and an output terminal, and the microcontroller in the circuit board is respectively connected with a digital tube display circuit, a current detecting circuit and a command input isolation circuit which is connected with a control terminal. The forward and reversal rotation soft-starting braking controller for the alternating current motor has the advantage of integrating functions and advantages of motor forward and reversal rotation, an electronic soft starter and an electronic brake.
Description
Technical field: [0001] The invention relates to the technical field of motor control, in particular to a device for realizing reverse rotation, soft start and braking of an AC motor by using electronic power technology and microcomputer control technology. Background technique: [0002] AC motors are widely used in various industries due to their low cost, high reliability and easy maintenance. Especially in machine tool equipment, as a main power equipment, it is often used to drive spindles, workbenches, cooling pumps, oil pumps and other devices. However, when it is directly started, since the starting current is as high as 5 to 7 times the rated current, it will cause a great impact on the power grid and load, affect the work of peripheral electrical appliances, increase the wear of mechanical transmission components, and reduce the service life of the equipment. [0003] During the machining process of the machine tool equipment, the motor is not allowed to rotate wit...
Claims
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IPC IPC(8): H02P1/40H02P1/28H02P3/24
Inventor 刘志涛
Owner 刘志涛
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