Wireless sensing device and measuring method for instantaneous input power of lifting motor

Abstract

The invention discloses a wireless sensing device and a measuring method for instantaneous input power of a lifting motor and is suitable for a three-phase alternating current (AC) asynchronous motor used for a crane. The wireless sensing device for the instantaneous input power of the lifting motor comprises a Hall current sensor connected with the phase-A electric energy input end of the three-phase AC asynchronous motor used for the crane; a pin M of the Hall current sensor is respectively connected with a sampling resistor and a wireless signal processing device; the sampling resistor is grounded; the output end of the wireless signal processing device is connected with the pin M of a Hall voltage sensor; and the input end of the Hall voltage sensor is bridged onto the phase A and the phase B of the three-phase AC asynchronous motor used for the crane. The wireless sensing device for the instantaneous input power of the lifting motor is simple in structure and low in cost and is safe and reliable. Data is transmitted by adopting a wireless transmission mode, and therefore, various defects of signal wire transmission can be effectively avoided. The wireless sensing device and the measuring method for the instantaneous input power of the lifting motor are especially suitable for online measurement of the instantaneous input power of an active lifting motor in a production environment which is comparatively severe.

Description

technical field [0001] The invention relates to a wireless sensing device, in particular to a wireless sensing device and a measuring method for instantaneous input power of a hoisting motor suitable for a three-phase AC asynchronous motor used in a crane. Background technique [0002] Hoisting machinery is an important basic equipment in national economic construction, and the motor used in it is an important mechanical equipment to realize electromechanical energy conversion and change electrical energy characteristics. With the increasing emphasis on energy saving and environmental protection in various countries, more accurate measurement of motor operating efficiency, especially the online measurement of the energy efficiency of active hoisting motors, can provide information for the development of crane design, manufacturing, transformation, and energy-saving work for units that use them. References are very important. [0003] At present, the general test methods for...

AI Technical Summary

Problems solved by technology

However, on the one hand, it is more expensive than traditional test equipment; on the other hand, its wired transmission of output signals has disadvantages such as poor reliability and cumbersome manual maintenance; Most of the motors used are bulky, heavy and difficult to disassemble, which cannot meet the measurement conditions of most intelligent power test instruments

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