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Water pump motor intelligent digital display protection switch

A water pump motor and protection switch technology, applied in emergency protection circuit devices, automatic disconnection emergency protection devices, electrical components, etc., can solve problems such as complex circuits, and achieve the effects of high control accuracy, intuitive display, and stable and reliable performance.

Active Publication Date: 2016-09-14
河北天成电力科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the above-mentioned patent is that the circuit is more complicated, there is no current and voltage display function, and the calibration and adjustment of the current cannot be performed.

Method used

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  • Water pump motor intelligent digital display protection switch
  • Water pump motor intelligent digital display protection switch
  • Water pump motor intelligent digital display protection switch

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1 (for three-phase water pump circuit, see Figure 1~6 ):

[0015] Depend on Figure 1~6 It can be seen from the illustrated embodiment that this embodiment is composed of a controller, a current sampling circuit, a power supply and a voltage sampling circuit, a display circuit, a drive execution and an audible alarm circuit; the output ends of the current sampling circuit, the power supply and the voltage sampling circuit are respectively connected to the corresponding input terminal of the controller; one output terminal of the controller is connected to the input terminal of the display circuit, and the other output terminal is connected to the input terminal of the driving execution and sound alarm circuit.

[0016] The three-phase current sampling circuit is composed of A-phase, B-phase and C-phase current sampling circuits, and the structure of the A-phase, B-phase and C-phase current sampling circuits is the same, wherein the A-phase current sampling ...

Embodiment 2

[0039] Embodiment 2 (for single-phase water pump motor):

[0040] Embodiment 2 is different from Embodiment 1 in that its current sampling circuit only has phase A, that is, the single-phase current sampling circuit is composed of the first current mutual induction coil LA, the first rectifier bridge D1~D4, resistors R1~R2, and capacitor C1. ; The first current mutual induction coil LA is set on the A-phase input line of the water pump motor, the two ends of the first current mutual induction coil LA are connected to the input terminals of the first rectifier bridge D1~D4, and the capacitor C1 and The resistor R2 is connected in parallel to the output terminals of the first rectifier bridge D1~D4, and the resistor R1 is connected in parallel with the first current mutual induction coil LA; the output terminals of the first rectifier bridge D1~D4 are respectively AD1 and ground.

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PUM

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Abstract

The invention discloses an intelligent digital display protective switch of a water pump motor. The intelligent digital display protective switch is composed of a controller, a current sampling circuit, a power supply, a voltage sampling circuit, a display circuit and a driving executive and audible alarming circuit, wherein the output ends of the current sampling circuit, the power supply and the voltage sampling circuit are connected with the corresponding input ends of the controller, one output end of the controller is connected with the input end of the display circuit, and the other output end of the controller is connected with the input end of the driving executive and audible alarming circuit. The intelligent digital display protective switch of the water pump motor has the beneficial effects of simple structure, high control precision, stable and reliable performances, visual display effect, and convenience for operation, and has an acoustic alarming function.

Description

technical field [0001] The invention relates to an intelligent digital display protection switch for a water pump motor, which is suitable for short circuit, phase loss, overcurrent, dry running, undervoltage and overvoltage protection of the water pump motor. Background technique [0002] The Chinese patent discloses a "submersible electric pump, motor phase failure, overcurrent automatic protection switch" (Patent No.: 200520024353.1). Overcurrent protection trigger circuit, thyristor main circuit and execution circuit; the primary of the three current transformers in the open-phase detection circuit are connected to the three phases of A, B and C of the power supply according to the conventional connection method, and the three current mutual inductors The secondary coils of the device are connected in series to form an open triangle; one output of the phase failure detection circuit is connected to the input terminal of the phase failure protection trigger circuit, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/08H02H3/04H02H7/093H02H7/09
Inventor 徐华东侯增鸿钟志强
Owner 河北天成电力科技有限公司