CN-122017375-A - Three-phase motor phase sequence checking device

CN122017375ACN 122017375 ACN122017375 ACN 122017375ACN-122017375-A

Abstract

The invention relates to a phase sequence checking device of a three-phase motor, which comprises a detection circuit unit, an external connection interface, a power module, a result feedback unit and a shell, wherein the detection circuit unit relates to the technical field of motor wiring detection. The three-phase motor phase sequence checking device is high in detection safety, is completely operated under the power-off and static conditions, thoroughly avoids short circuit, equipment damage and personal safety risks possibly caused by wiring errors in the traditional power-on test method, and remarkably improves detection efficiency and reliability.

Inventors

CHEN CHAO
Pan Xinglin
CHEN XIAOFENG
HAN SHUNHU
CHEN SHAOBO

Assignees

上海汇波智能控制设备股份有限公司
安波电机(宁德)有限公司
福安市闽东安波电器有限公司

Dates

Publication Date: 20260512
Application Date: 20260402

Claims (7)

1. The three-phase motor phase sequence checking device is characterized by comprising a detection circuit unit, an external connection interface (11), a power supply module, a result feedback unit and a shell; The detection circuit unit is electrically connected with the external connection interface (11) and is used for automatically judging whether the wiring of the three-phase motor accords with preset correct wiring logic or not; The result feedback unit is electrically connected with the detection circuit unit and is used for receiving and feeding back the judgment result of the detection circuit unit.
2. The phase sequence inspection apparatus of claim 1, wherein the wiring logic is that three phases U1-U2, V1-V2, W1-W2 are respectively conducted, and the detection circuit unit comprises: a power supply connected in series with the detection circuit of the detection circuit unit for supplying current to the detection circuit; The LED lamp is connected with the detection circuit in parallel and is used for feeding back whether the power supply is powered or not and feeding back whether a detection result is line fault or wiring error; A detection circuit connected in series with the power supply for processing the three-phase motor wiring detection result, the detection circuit comprising three independent detection loops connected in series, each independent detection loop comprising: a power supply connected in series in the independent detection loop for providing current for the loop; a current limiting resistor connected in series in the independent detection loop for limiting loop current; The light emitting diode at the input side of the optical coupler is connected in series in the independent detection loop and is used for feeding back the on-off result of the independent detection loop to the output side of the optical coupler so as to disconnect or connect the output side; The two detection contacts are connected in series in the independent detection loop and are used for detecting whether two ends of a corresponding coil of the three-phase motor are correctly connected on the wiring board or not; three independent detection loops are connected in series into a large loop, and the loop comprises: the optocoupler output sides of the three independent detection loops are connected in series in the loops and used for feeding back whether the wiring state of the three-phase motor is correct or not; A power supply connected in series in the loop for supplying current to the loop; the buzzer is connected in parallel in the loop and is used for directly feeding back whether the wiring state of the three-phase motor is correct or not; A current limiting resistor connected in parallel with an LED in the loop for limiting the current of the series circuit; and the LED is connected in series with the current limiting resistor and then connected in parallel in the loop to directly feed back whether the wiring state of the three-phase motor is correct.
3. The phase sequence checking device of a three-phase motor according to claim 1, wherein the detection circuit unit includes three groups.
4. The phase sequence checking device of a three-phase motor according to claim 1, wherein the result feedback unit comprises a buzzer and at least one LED indicator light.
5. The three-phase motor phase sequence checking device according to claim 1, characterized in that said external connection interface (11) comprises a set of adaptive connection interface assemblies comprising: the insulating base (1) is provided with six mounting holes; six correspond set up the elastic conductive contact in six mounting holes, elastic conductive contact includes: the conductive screw (4) is used for contacting a binding post of a wiring board on the motor; the spring (2) is sleeved on the conductive screw (4); The locking nut (3) is matched with the threaded part of the conductive screw (4) and pre-tightens the conductive screw (4) on the insulating base (1); The tail part of the conductive screw (4) is electrically connected with the detection circuit unit through a wire.
6. The phase sequence checking device of claim 1, wherein the power module comprises a power switch and a power indicator for indicating the power-on state of the device, and providing diagnosis directions of "device fault" and "wiring error" when the detection result is wiring error.
7. The phase sequence inspection device of a three-phase motor according to claim 1, wherein the surface of the housing is provided with an observation window for indicating the operating state of the device; The shell is internally provided with a first mounting hole (5) for mounting a result feedback indicator lamp, a second mounting hole (6) for mounting a power supply indicator lamp, a third mounting hole (7) for mounting a power supply switch, a first mounting position (8) for mounting a detection unit circuit board, a fourth mounting hole (9) for mounting a buzzer and a second mounting position (10) for mounting a power supply; the external connection interface (11) is mounted on the housing in a telescopic manner.

Description

Three-phase motor phase sequence checking device Technical Field The invention relates to the technical field of motor wiring detection, in particular to a device for checking phase sequence and wiring correctness after three-phase motor wiring is completed. Background Three-phase motors are extremely widely used in industrial production and daily life. During its installation or maintenance, it is necessary to correctly connect the six leads (U1, U2, V1, V2, W1, W2) of the internal winding of the motor to the terminal block to form a star (Y) or delta (delta) connection, so that the motor operates according to a preset steering. The correct wiring is a prerequisite for ensuring the normal starting and running of the motor and avoiding the failure, the efficiency reduction and the reversion of the motor caused by phase failure or phase sequence error. At present, after wiring is completed in motor production, a method for checking whether wiring is correct usually depends on manually and visually observing whether a lead mark corresponds to a wiring board mark or not, or after a connecting sheet (Y type or delta type) is installed, after a motor is started in a motor electric detection process, a Hall is used for detecting the direction of a motor magnetic field, and whether wiring is wrong or not is identified by judging steering. However, there are a number of drawbacks to these two conventional detection approaches: 1. the lead sleeve label or patch panel identification may be faulty and can only be used as a reference, and cannot be used as a standard. 2. It is difficult to achieve 100% accuracy by manual visual inspection. 3. The Hall detects the magnetic field direction, and the problem that the Hall positions are different and the magnetic field direction is also different exists, so that the Hall positions have influence on the detection result. 4. The Hall detects the magnetic field direction, the motor needs to complete the whole machine assembly and start operation, and wiring errors cannot be found in time. Therefore, a special detection device capable of rapidly, accurately and intuitively automatically judging whether the wiring of the three-phase motor is correct or not and effectively reducing technical dependence on operators is urgently needed in the field. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a phase sequence checking device for a three-phase motor, and aims to provide a device for quickly, effectively and intuitively judging whether the installation positions of U1, V1 and W1 and U2, V2 and W2 on a wiring board are correct or not after the wiring process of the three-phase motor is finished, so that the normal starting and running of the motor are ensured. The three-phase motor phase sequence checking device comprises a detection circuit unit, an external connection interface, a power module, a result feedback unit and a shell; The detection circuit unit is electrically connected with the external connection interface and is used for automatically judging whether the wiring of the three-phase motor accords with preset correct wiring logic. The result feedback unit is electrically connected with the detection circuit unit and is used for receiving and feeding back the judgment result of the detection circuit unit; when the judgment result is that the wiring is correct, the result feedback unit is triggered to send out a prompt signal; And when the judging result is a wiring error, the result feedback unit keeps a non-triggering state. As a further scheme of the invention, the preset correct wiring logic is that three phases of U1-U2, V1-V2 and W1-W2 are respectively conducted, and the detection circuit unit comprises: a power supply connected in series with the detection circuit of the detection circuit unit for supplying current to the detection circuit; The LED lamp is connected with the detection circuit in parallel and is used for feeding back whether the power supply is powered or not and feeding back whether a detection result is line fault or wiring error; A detection circuit connected in series with the power supply for processing the three-phase motor wiring detection result, the detection circuit comprising three independent detection loops connected in series, each independent detection loop comprising: a power supply connected in series in the independent detection loop for providing current for the loop; a current limiting resistor connected in series in the independent detection loop for limiting loop current; An optical coupler input side LED connected in series with the independent detection loop for feeding back the on-off result of the independent detection loop to the optical coupler output side to turn off or turn on the output side And the two detection contacts are connected in series in the independent detection loop and are used for detecting whether the two ends of the corresponding coil of the three-phase motor ar