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Baby carrier speed change drive circuit

A variable-speed drive and circuit technology, applied in the control drive, electric vehicles, vehicle components, etc., can solve the problems of high-speed FETs with large load, high cost, and easy damage.

Inactive Publication Date: 2014-03-26
RESTAR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is costly, and the high-speed FET has a large load and is easily damaged

Method used

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  • Baby carrier speed change drive circuit
  • Baby carrier speed change drive circuit

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Experimental program
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Effect test

Embodiment Construction

[0010] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0011] Such as figure 1 As shown, the PWM control circuit outputs a pulse square wave with a certain duty ratio to the drive circuit, and the drive circuit drives the motor to work and limits the current flowing through the motor, so as to achieve the purpose of variable speed. The variable speed switching module enables the car to switch between high and low speeds. The overcurrent protection module cuts off the driving pulse when the motor is stuck to prevent the motor and FET from burning out.

[0012] refer to figure 2 It can be seen that when VCC has a voltage input, the third pin of the time base IC U2 (NE555) outputs a pulse square wave with a duty ratio of 82.5% to the gate of the field effect transistor Q10, and the drain of the field effect transistor works , and then drive the motor M1 to work. Because the field effect transist...

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PUM

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Abstract

The invention discloses a baby carrier speed change drive circuit which comprises a time base IC U2, a sound effect tube Q10, a sample resister R23 and a transistor Q9. When the time base IC U2 works, pulse square waves drive a field-effect tube to work, a motor is in a current-limiting state, the speed of the baby carrier is reduced, and when a relay works, the time base IC stops working, the field-effect tube is shorted out by the relay, the current of the motor is not limited, the speed of the baby carrier is increased, and therefore the purpose of speed change is achieved. The relay forms a speed change switching module, an overcurrent protection module cuts off drive pulses when the motor is locked, and the motor and the field-effect tube are prevented from being burnt. The baby carrier speed change drive circuit has the advantages of being simple in circuit, low in cost and not prone to being damaged.

Description

technical field [0001] The invention relates to the field of motor drive circuits, in particular to a variable-speed drive circuit for a stroller. Background technique [0002] With the improvement of people's living standards, more and more remote control / electric baby carriages are sold on the market, gradually entering people's lives. Due to the toy attributes of remote control / electric baby carriages, the safety of children during use must be considered. The Chinese toy standard GB6675-2003 stipulates that the product is loaded with a weight of 25Kg, and the straight-line driving speed cannot exceed 8 km / h on a flat concrete field. Because the age of children's carriages is generally 3 to 8 years old, and the age span is relatively large, so many children's carriages now have two or more speeds for switching to meet the needs of children of different ages. At present, the variable speed driving circuit of children's carriage mostly adopts program control mode, and uses...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/00
Inventor 陈雁升
Owner RESTAR GRP
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