Temperature self-balancing overheating protection brushless direct current motor driver for bread maker

A brushless DC motor and overheating protection technology, which is applied in the direction of electronic commutator, single motor speed/torque control, etc., can solve the problems of low efficiency, low efficiency of AC motor, large electromagnetic noise, etc., and achieve simple circuit and structure Effects of compactness, improved safety and applicability

Active Publication Date: 2013-07-24
FGLS ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The efficiency of traditional AC motors for bread machines is low, generally between 30% and 40%, and the electromagnetic noise is large. With the deterioration of the global climate, building a resource-saving and environment-friendly society is generally recognized by various countries. Ener

Method used

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  • Temperature self-balancing overheating protection brushless direct current motor driver for bread maker
  • Temperature self-balancing overheating protection brushless direct current motor driver for bread maker
  • Temperature self-balancing overheating protection brushless direct current motor driver for bread maker

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[0017] Attached below figure 1 To further explain the present invention:

[0018] A temperature self-balancing overheat protection DC brushless motor driver for bread machine, including: control chip 1, speed measurement output circuit 2, speed control input circuit 3, hall rotor position sensor detection circuit 4, temperature measurement circuit 5, IPM power Module circuit 6, over-current detection circuit 7, because the bread machine needs low speed and high torque, so the control chip 1 we use the 120 degree hardware drive control chip produced by ROHM company that adopts the upper arm PWM control method, in order to reduce the switching noise, its oscillation The frequency is set to 20KHz, and the speed control voltage changes within the range of 1.7V~6.0V. When the speed control voltage is 6.0V, the corresponding PWM duty cycle is MAX95%, and the speed control voltage MIN is 1.7V~2.5V, which is lower than The motor stops rotating at 1.7V. When the speed control voltage is g...

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Abstract

A temperature self-balancing overheating protection brushless direct current motor driver for a bread maker comprises a control chip, a rotation speed measuring output circuit, a rotation speed control input circuit, a Hall rotor position sensor detection circuit, a temperature measuring circuit, an intelligent power module (IPM) power module circuit and an over-current detection circuit, and is characterized in that the control chip is a 120-degree hardware drive control chip and adopts an upper arm pulse-width modulation (PWM) control mode, the oscillation frequency is set as 20KHz, the rotation speed control voltage is set between 1.7V and 6.0V, the temperature measuring circuit is connected with the rotation speed control input circuit in parallel and comprises a positive temperature coefficient thermistor R23 and a triode transistor Q2, and the over-current detection circuit is connected with the IPM power module circuit in parallel. The temperature self-balancing overheating protection brushless direct current motor driver for the bread maker has the functions of over-current self-balancing overheating protection, undervoltage self-balancing overheating protection and temperature self-balancing overheating protection.

Description

technical field [0001] The invention relates to a temperature self-balancing circuit for a bread machine, in particular to a temperature self-balancing overheat protection DC brushless motor driver for a bread machine. Background technique [0002] The DC brushless motor for bread machine is composed of two parts: the driver and the motor body, among which the DC brushless motor driver is its core component. The efficiency of traditional AC motors for bread machines is low, generally between 30% and 40%, and the electromagnetic noise is large. With the deterioration of the global climate, building a resource-saving and environment-friendly society is generally recognized by various countries. Energy-saving products have become new products that are encouraged to be developed and used in various countries, and brushless DC motors are energy-saving and environmentally friendly products with high efficiency and low noise, and are ideal substitutes for the original low-efficienc...

Claims

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Application Information

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IPC IPC(8): H02P6/08H02P6/16
Inventor 李月红
Owner FGLS ELECTRIC CO LTD
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