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The air switch activates the working principle of the soft rear brake control circuit as shown in oxygen 2 to become the 11 AC power supply. At this time, the soft start electric fan runs to prepare for the soft start. When 562 is pressed, the control power enters the soft starter, and the soft start starts to work. When the load reaches the normal speed, there is a node idle between the terminals 80-90, so that the K contactor is closed, and K often 1 is a simple charm.拙 钓 occupies the new Huzhou 4 pokes, the 磕 磕 金 金 5% 5% 助 助 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 瑶 , , , , , , , , , , , K drives the motor to work normally.
4 Reasons for improvement The soft starter of the soft starter in the first month of this year, due to the cold weather, the increase of the air compressor start load and the poor temperature stability of the electronic components in the soft starter, etc. 8 90 output nodes can not rain, resulting in 1 / [ contactor can not pull, the air compressor can not work properly.
5 Improved method As shown in Figure 3, 90 buttons are added. When the soft start is working, as long as the motor runs normally, even if the soft starter contacts of 80-90 are not closed, the contactor can be pressed artificially. Work normally and disconnect the soft starter.
6 Conclusions Through this improvement, the start-up process of the air compressor can adapt to the harsh environment of dolomite winter, and overcome the problems caused by the temperature stability of electronic components. In addition, the soft starter startup device not only reduces the power supply line system. The impact also has a greater protection for the motor. Moreover, the device has simple control, reliable operation, large device capacity and low cost, and has high use and promotion value.
Improvement of Soft Start Control of YZ-35 Drill Air Compressor
Working principle of air compressor soft rear brake control The essence of soft start technology is to control the conduction angle of the internal intergranular tube of the actuator to make the motor gradually increase from zero to the preset function relationship until the end of the motor. The voltage is full voltage. Here we use the contactor bypass working state. That is to say, when the motor is running at full speed, the bypass starter is used to replace the soft starter that has completed the start function, which reduces the heat loss of the intergranular tube and improves the working efficiency of the system. The main loop circuit, the soft starter is composed of a H-parallel inter-phase tube voltage regulation and speed-regulating circuit connected in series between the power source and the controlled motor, as shown in Fig. 1. Using the electronic switching characteristics of the intergranular tube, the trigger pulse is controlled by a single-chip microcomputer in the starter, and the magnitude of the firing angle is used to change the conduction degree of the intergranular tube, thereby changing the three-phase voltage applied to the stator winding. When the motor starts successfully, that is, when the soft starter is running at full pressure, the bypass contactor is turned on by the coincidence of the internal contact of the soft rear brake, and the soft starter is powered off by the auxiliary contact of the bypass contactor. The road contactor turns on the motor.