Control System of Sliding Robot-Bus Type

Release time：2019-04-17 09:25:41Source：匿名

Nowadays, the new direction in the field of sliding contact wire is a new topic discussed by various manufacturers and industries.
At present, the design of sliding contact wire in our country is to control an action by power supply of sliding contact wire. Electric hoist, as an efficient transportation tool, has been widely used in various industries. In the electric hoist used in the domestic automotive industry, the sliding contact lines are U, V and H, etc. However, due to the design of electric hoist action is more, the need for more control models, so the more sliding contact lines, so the failure of electric hoist will increase.
Through a lot of experiments, the author reduces the failure rate of electric hoist by reducing the number of sliding contact lines. That is to say, a sliding contact wire is used to supply power to complete the two action processes.
1. Working Principle
When there is no voltage in sliding contact H1, the original side of transformer TR1 and TR2 are identical with the same name terminal, while the secondary side is opposite to the same name terminal. There is no voltage at both ends of J1 coil of intermediate relay, ZC and FC of contactor do not operate.
(2) When the J2 contacts of the intermediate relay are sucked (J3 is not sucked), the sliding contact H1 is R-phase voltage, and TR1 has no voltage output on the secondary side because both ends of the original side are the same R-phase voltage. The original side of TR2 is R-phase and S-phase 380V voltage, and J1 is suction point. Because both ends of contactor ZC are the same R-phase voltage, it can not be suction. The two ends of contactor FC are R-phase and S-phase 380V voltage, and the contactor FC sucks, completing the descending action.
(3) The same principle, when J3 sucks (J2 does not), contactor ZC sucks, completes the ascending action.
2. Selection of Electrical Component Parameters
Transformer TR1 and TR2 should choose standard control transformer. Considering the small coil capacity of intermediate relay, transformer capacity can be 1.5-2 times of coil capacity.
(2) Considering that transformer TR1 and TR2 have a certain voltage drop, when choosing transformer, the transformer with large turn ratio should be chosen to reduce the impedance of transformer's secondary side. Generally, 380V/24V and 380V/36V should be chosen. In the design of electric hoist, any two signals that do not need simultaneous operation can be realized by the principle of phase difference at the same name end of transformer, which reduces the number of sliding contact lines and reduces the failure rate. This method has been applied to electric hoist of our company. Since the installation in October 1994, the normal operation has achieved remarkable results.