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A control circuit, crane technology, applied in transportation and packaging, motor generator/starter, starter of a single multi-phase induction motor, etc. and other problems to achieve the effect of avoiding excessive starting current
Active Publication Date: 2020-08-21
WUHAN MARINE MACHINERY PLANT
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[0004] For a crane with a large power, the motor of the three-phase pump set has a large power, which will generate a large starting current when starting, which may damage the control circuit
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[0021] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0022] figure 1 It is a partial schematic diagram of a crane control circuit provided by an embodiment of the present invention. figure 2 It is another partial schematic diagram of a crane control circuit provided by the embodiment of the present invention. combine figure 1 and figure 2As shown, the crane control circuit includes a three-phase pump motor 11, a first motor switch 101, a second motor switch 102, a third motor switch 103, a three-phase terminal A, a first mains terminal B, a second mains Terminal C, start switch 200, first coil 301, second coil 302, third coil 303, fourth coil 304, fifth coil 305, sixth coil 306, seventh coil 307, first switch 201, second switch 202, the third switch 203, the fourth switch 204, the ...
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Abstract
The invention discloses a crane control circuit. The control circuit comprises a three-phase pumping group motor, a first motor switch, a second motor switch, a third motor switch, a three-phase wireconnecting terminal, a first electric supply terminal, a second electric supply terminal, a starting switch, a first coil, a second coil, a third coil, a fourth coil, a fifth coil, a sixth coil, a seventh coil, a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a seventh switch, an eighth switch, a ninth switch and a tenth switch; a U terminal, a V terminal and a W terminal are connected with the first motor switch, the first motor switch is connected with the three-phase wire connecting terminal, an X terminal, a Y terminal and a Z terminal are connected with the second motor switch and the third motor switch, the second motor switch is connected with the three-phase wire connecting terminal, when a starting switch is triggered, the three-phase pumping groupmotor is converted from star starting to triangular starting, and therefore the problem of excessively strong starting current is avoided.
Description
technical field [0001] The invention relates to the field of cranes, in particular to a crane control circuit and the crane. Background technique [0002] A crane is a common construction machine used to lift heavy objects. [0003] A crane usually includes a hydraulic system and a control circuit, and the hydraulic system can be used to control the crane to lift heavy objects. The control circuit can control the hydraulic system. The control circuit usually includes a three-phase pump set motor and some switching devices. The three-phase pump set motor is used to drive the pump set of the hydraulic system to operate. The switching device can also control the solenoid valve in the hydraulic system to realize the control of the crane. . [0004] For a crane with a large power, the motor of the three-phase pump set has a large power, which will generate a large starting current when starting, which may damage the control circuit. Contents of the invention [0005] The em...
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Application Information
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