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Peripheral general circuit of Hall sensors

A Hall sensor and general-purpose circuit technology, which is applied to general control systems, program control in sequence/logic controllers, instruments, etc., can solve problems such as high R&D costs and long development cycles

Inactive Publication Date: 2015-11-04
WUHU MOTIONTEC AUTOMOTIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When designing, it is necessary to design the corresponding peripheral circuit for a certain type or type of motor, the development cycle is long, and the research and development cost is high

Method used

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  • Peripheral general circuit of Hall sensors
  • Peripheral general circuit of Hall sensors

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Experimental program
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Embodiment Construction

[0014] The voltage type Hall chip generally has three pins, which are power, ground and output. The output pin is connected to the power supply through a pull-up resistor. The Hall chip outputs a square wave pulse signal by inducing rotating magnetic poles. The signal level is the same as the chip power supply voltage. If the power supply of the Hall chip is not higher than the MCU power supply, the pulse signal can be directly read by the MCU. The current-type Hall chip is defined with two pins, which are connected in series to the circuit and connected to the power supply and ground through a current-limiting resistor. When the magnetic pole is close to the Hall chip, it will consume more current, which causes the voltage drop on the current-limiting resistor to be different when the magnetic pole is close and far away. With a comparator, this voltage difference can be amplified and processed. Square wave pulse signal that can be read by MCU.

[0015] Such as figure 1 As shown...

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Abstract

The invention discloses a peripheral general circuit of Hall sensors. The peripheral general circuit is characterized in that the circuit comprises potential signals Hall_1 and Hall_2 output by the Hall sensors in a motor, a comparator U4A and a resistor R32 are connected in parallel and then connected with the potential signal Hall_1 and a resistor R9 so that the potential signal Hall_1 to be read by an MCU is output, and a comparator U4B and a resistor R33 are connected in parallel and then connected with the potential signal hall_2 and a resistor R30 so that the potential signal Hall_2 to be read by the MCU is output. Thus, one circuit board is suitable for motors with different Hall sensors, it is not required to design an interface circuit corresponding to one type of motor, and instead, only components are a public board need to be adjusted.

Description

Technical field [0001] The invention relates to the improvement of the peripheral circuit of a Hall sensor, in particular to a peripheral general circuit of the Hall sensor. Background technique [0002] In a general motor control system, the speed signal is a very important parameter to be continuously fed back to the control system. The Hall sensor is the most important sensor that converts the speed signal into an electrical signal. A magnetic ring (usually two pairs of poles or four pairs of poles) is installed on the rotor shaft of the motor. When the motor rotates, the magnetic ring will rotate with it. The Hall sensor is installed close to the magnetic ring. Each magnetic pole is close to the magnetic ring. When the sensor is installed, the internal Hall switch will be turned on, and will be turned off when the magnetic pole is removed. With appropriate peripheral circuits, the Hall sensor will output a set of pulse signals as the magnetic poles approach and move away. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/04
CPCG05B19/04G05B2219/25338
Inventor 周玉成杜中发姚峰蔡敏
Owner WUHU MOTIONTEC AUTOMOTIVE