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CN-224218108-U - Three-phase power supply system and electrical equipment

CN224218108UCN 224218108 UCN224218108 UCN 224218108UCN-224218108-U

Abstract

The three-phase power supply system comprises a controller, a first switch module, a second switch module and an induction device, wherein the induction device is arranged on three power supply branches of the system, induction signal output ends of the induction device are connected with the controller, control ends of the first switch module and the second switch module are respectively connected with the controller, the first switch module is arranged between a first phase input end and a first phase output end, between a second phase input end and a second phase output end, and between the first phase input end and the second phase output end, and between the second phase input end and the first phase output end. According to the embodiment of the application, when the three-phase electric connection is wrong, the phase sequence of each branch is automatically adjusted, the wrong connection sequence is not required to be manually adjusted, and the automation level of fault treatment of the three-phase electric equipment is improved.

Inventors

  • LIN HAOXIAN
  • HE HUANZHEN
  • YANG FAN

Assignees

  • 珠海格力电器股份有限公司

Dates

Publication Date
20260508
Application Date
20250430

Claims (5)

  1. 1. The three power supply branches of the system comprise a first phase input end, a second phase input end, a third phase input end, a first phase output end, a second phase output end and a third phase output end; The induction device is arranged on three power supply branches of the system, and an induction signal output end of the induction device is connected with the controller; the first switch module is arranged between the first phase input end and the first phase output end, the second phase input end and the second phase output end, and the second switch module is arranged between the first phase input end and the second phase output end, and the second phase input end and the first phase output end.
  2. 2. The system of claim 1, further comprising a third switch module, an input of the third switch module being connected to at least two of the first phase output, the second phase output, and the third phase output, an output of the third switch module being connected to a three phase load device; the control end of the third switch module is connected with the controller; The sensing device is a current sensor, and the controller is further configured to determine a current on each of the three power supply branches by using the current sensor, and send a second control signal to the third switch module if the current on any one of the three power supply branches is greater than or equal to a preset current threshold value, so that at least two of the three power supply branches are disconnected from the three-phase load device.
  3. 3. The system of claim 1, wherein the first switch module comprises a first switch unit, a second switch unit and a first control unit, the first switch unit is arranged on a line between the first phase input end and the first phase output end, the second switch unit is arranged on a line between the second phase input end and the second phase output end, a signal transmission end of the first control unit is connected with the first switch unit and the second switch unit, and a control end of the first control unit is connected with the controller; The second switch module comprises a third switch unit, a fourth switch unit and a second control unit, wherein the third switch unit is arranged on a circuit between the first phase input end and the second phase output end, the fourth switch unit is arranged on a circuit between the second phase input end and the first phase output end, a signal transmission end of the second control unit is connected with the third switch unit and the fourth switch unit, and a control end of the second control unit is connected with the controller.
  4. 4. A system according to claim 3, wherein the control terminal of the first control unit and the control terminal of the second control unit are connected to the same control signal output terminal of the controller; the first control unit and the second control unit are controlled by the same control signal, wherein one control unit is turned on, and the other control unit is turned off.
  5. 5. An electrical device comprising the three-phase power supply system of any one of claims 1-4.

Description

Three-phase power supply system and electrical equipment Technical Field The application relates to the technical field of electric power, in particular to a three-phase power supply system and electrical equipment. Background Conventional three-phase electrically driven devices, such as motors, may cause the motor to reverse direction or even damage the device if the phase sequence is misconnected. Still other devices, if phase sequence is incorrect, may cause the device to overheat, vibrate, or otherwise malfunction. Therefore, some phase sequence detecting devices are generally added in the three-phase electrically driven equipment to detect the phase sequence of the input power supply so as to avoid the risk caused by wrong wiring. The phase sequence detection is used for ensuring the correctness of the phase sequence and preventing equipment from being damaged. However, a general phase sequence protector is only used for cutting off output when detecting phase sequence errors, so that the device cannot be powered. Then, the line sequence of the input needs to be manually adjusted, so that the operation is inconvenient and the efficiency is low. Therefore, how to efficiently correct the problem when the three-phase electric equipment has a line sequence connection error is a problem to be solved. Disclosure of utility model In view of this, in order to solve some or all of the above technical problems, an embodiment of the present application provides a three-phase power supply system and an electrical apparatus. In a first aspect, an embodiment of the application provides a three-phase power supply system, which comprises a controller, a first switch module, a second switch module and an induction device, wherein three power supply branches of the system comprise a first phase input end, a second phase input end, a third phase input end, a first phase output end, a second phase output end and a third phase output end, the induction device is arranged on three power supply branches of the system, an induction signal output end of the induction device is connected with the controller, control ends of the first switch module and the second switch module are connected with the controller, the first switch module is arranged between the first phase input end and the first phase output end, between the second phase input end and the second phase output end, and between the second phase input end and the first phase output end. In one possible implementation mode, the system further comprises a third switch module, wherein the input end of the third switch module is connected with at least two of the first phase output end, the second phase output end and the third phase output end, the output end of the third switch module is connected with three-phase load equipment, the control end of the third switch module is connected with the controller, the induction device is a current sensor, the controller is further used for determining the current of each of the three power supply branches by using the current sensor, and if the current of any one of the three power supply branches is greater than or equal to a preset current threshold value, a second control signal is sent to the third switch module, so that at least two of the three power supply branches are disconnected with the three-phase load equipment. In one possible embodiment, the first switch module comprises a first switch unit, a second switch unit and a first control unit, the first switch unit is arranged on a line between the first phase input end and the first phase output end, the second switch unit is arranged on a line between the second phase input end and the second phase output end, a signal transmission end of the first control unit is connected with the first switch unit and the second switch unit, a control end of the first control unit is connected with the controller, the second switch module comprises a third switch unit, a fourth switch unit and a second control unit, the third switch unit is arranged on a line between the first phase input end and the second phase output end, the fourth switch unit is arranged on a line between the second phase input end and the first phase output end, a signal transmission end of the second control unit is connected with the third switch unit and the fourth switch unit, and a control end of the second control unit is connected with the controller. In one possible implementation, the control end of the first control unit and the control end of the second control unit are connected to the same control signal output end of the controller, and one of the first control unit and the second control unit is turned on and the other control unit is turned off under the control of the same control signal. In a second aspect, an embodiment of the present application provides an electrical apparatus, including the three-phase power supply system described in the second aspect. According to the three-phase power