CN201051657Y

CN201051657Y - DC electromotor blocking and rotation control device

Info

Publication number: CN201051657Y
Application number: CNU2007200075573U
Authority: CN
Inventors: 廖金堆
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-09
Filing date: 2007-07-09
Publication date: 2008-04-23
Anticipated expiration: 2017-07-09

Abstract

The utility model discloses a direct current machine locked-rotor control device, which comprises a power supply, a direct current machine, a mosfet electronic switching circuit, a sampling resistance, an impulse control switch, a comparator circuit, and a core current supply circuit. The utility model is characterized in that the mosfet electronic switching circuit comprises a mosfet, a switching diode, and a peripherial components electric resistance. The direct current machine, the mosfet electronic switching circuit, and the sampling resistance are connected in series, and the direct current machine is connected with a power supply through the mosfet electronic switching circuit. The impulse control switch and the comparator circuit are connected in parallel on the sampling resistance, the comparative output ends of the impulse control switch and the comparator circuit are connected with a mosfet control end of the mosfet electronic switching circuit, the impulse control switch and the comparator circuit control the mosfet electronic switching circuit, and the mosfet electronic switching circuit controls through and off of a power supply of the continuous current dynamo. Thereby the utility model has accurate and reliable generator locked-rotor and cut-out, strong antiweatherability, wide operating pressure range, and loss-free generator output torque (power supply) and the like.

Description

Direct current machine stall control device

Affiliated technical field:

The utility model belongs to direct current machine stall control field, relates in particular to a kind of direct current machine stall control device.

Background technology:

The circuit of control power cutoff behind existing automobile-used DC electric machine drive apparatus (as: the electronic movement product that collapses of outside rear-view mirror, power windows elevating mechanism etc.) the extreme position direct current machine stall; on thermocycling, high low-voltage test, exist and turn-off the some drift, even the fault that appearance is not forever turn-offed behind the low-voltage stall.Further analyze and find, existing product is to adopt to increase to the principle that certain value is carried out power cutoff with drive motors stall after-current mostly, so the not strong and narrow shortcoming of operating voltage range of weatherability is arranged.

Summary of the invention:

It is a kind of simple in structure that the purpose of this utility model is to provide, and can control the direct current machine stall control device of power remove according to limit stop bit motor rotation blockage information.

The purpose of this utility model is to realize like this, described direct current machine stall control device, comprise power supply, direct current machine, field effect transistor electronic switching circuit, sample resistance, pulse control switch, comparison circuit and chip power supply circuit, its design feature is that described field effect transistor electronic switching circuit comprises that field effect transistor, switching diode and peripheral devices resistance constitute; Direct current machine, field effect transistor electronic switching circuit and sample resistance three series connection, direct current machine is connected with power supply through the field effect transistor electronic switching circuit; Pulse control switch and comparison circuit are connected to sample resistance, the comparison output of pulse control switch and comparison circuit is connected with the field effect transistor control end of field effect transistor electronic switching circuit, pulse control switch and comparison circuit control field effect transistor electronic switching circuit, the break-make of field effect transistor electronic switching circuit control dc motor power.

The purpose of this utility model also can be achieved through the following technical solutions, described direct current machine stall control device, and its characteristics are that described pulse control switch and comparison circuit comprise that triode, voltage comparator and peripheral devices resistance, electric capacity constitute; The output of triode is connected with the input of voltage comparator, and the output of voltage comparator connects the field effect transistor control end through switching diode.Described direct current machine stall control device, its characteristics are that described pulse control switch and comparison circuit adopt the single chip machine controlling circuit that can realize pulse control switch and comparing function.

Advantage of the present utility model: the utility model changes with the fluctuating signal that the sampling components and parts detect direct-drive motor stall front and back electric current, to the electronic switch output instruction signal, carries out the conducting or the shutoff of electronic switch, thus the control motor power.The science feature of comparing with domestic and international this control of product method is: under the running and stall two states with motor, machine operation loop current pulse (pulsation) has or not and whether is used as the basis for estimation of power cutoff, the judgement of the two states of " 0 " and " 1 " just, the sampled signal separating degree is big, through trial product test and real dress test, turn-off accurately and reliably.Having overcome the existing product control method just changed by supply voltage to cause size of current to change and influences the sample resistance voltage drop and change, cause and turn-off shortcoming inaccurate and that low-voltage is not turn-offed, also overcome simultaneously and put the shortcoming that causes that the motor power output reduces because of the cut-off current value is low.Compare with domestic and international this control of product method, motor rotation blockage turn-offs accurately and reliably, and weatherability is strong, and operating voltage range is wide, motor output torque (power) free of losses.

Description of drawings:

Fig. 1 is the circuit block diagram of single game effect pipe of the present utility model as electronic switching circuit control single turning DC motor.

Fig. 2 is the circuit block diagram of double-field effect pipe of the present utility model as electronic switching circuit control rotating direct current machine.

Fig. 3 is a kind of example circuit schematic diagram of the present utility model.

Embodiment:

Below in conjunction with accompanying drawing and example structure of the present utility model and operation principle and the course of work are elaborated:

As Fig. 1, Fig. 2 and shown in Figure 3, the utility model comprises power vd C, direct current machine J1, field effect transistor electronic switching circuit 1, sample resistance R3, pulse control switch 2 and comparison circuit 3 and chip power supply circuit 4, and its design feature is that described field effect transistor electronic switching circuit comprises that field effect transistor U3A, U3B, switching diode D1, D2 and peripheral element resistance R 1, R2 constitute; Described pulse control switch and comparison circuit comprise that triode Q3, voltage comparator U1C, U2D and peripheral devices resistance R 5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, capacitor C 2, C3 constitute, described pulse control switch and comparison circuit also can adopt the single-chip microcomputer comparison control circuit, and two kinds of circuit all can be realized pulse control switch and comparing function; Chip power supply circuit comprises rectifying block D3, resistance R 4, capacitor C 1, is used for providing required power source voltage Vcc of pulse control switch and all elements of comparison circuit, chip or integrated package etc.; Direct current machine J1, field effect transistor electronic switching circuit 1 and sample resistance three series connection, direct current machine J1 connects power supply through field effect transistor electronic switching circuit 1, be S1 termination power one end of the field effect transistor of field effect pipe electronic switching circuit, field effect transistor D end is connected with direct current machine again; Pulse control switch 2 and comparison circuit 3 are connected on the sample resistance R3, and the comparison output of pulse control switch and comparison circuit is connected with field effect transistor control end G1, the G2 of field effect transistor electronic switching circuit; Described pulse control switch and comparison circuit comprise a pulse control switch of being made up of triode and the comparison circuit of being made up of voltage comparator, also can adopt single chip circuit to realize above-mentioned said function as pulse control switch and comparison circuit, the technology that single chip circuit can be realized for those skilled in the art; When the pulse control switch of the comparison circuit of forming when the pulse control switch of forming by triode with by voltage comparator and comparison circuit, the output of triode is connected with the input of voltage comparator, and the output of voltage comparator is received the field effect transistor control end through switching diode.When adopting Fig. 1, control the direct current machine of unidirectional commentaries on classics, when adopting Fig. 2, the direct current machine of control rotating.

Operation principle: when direct current machine rotates, the electric current in machine operation loop is pulsed, the sample resistance that is serially connected with the work loop produces a series of pulse voltage signal, pulse voltage signal is passed on the triode of pulse control switch, triode ends, this moment, the voltage comparator of pulse control switch and comparison circuit was exported high level, triggered the conducting of field effect transistor electronic switching circuit, kept direct current machine and rotated.When the direct current machine stall, the current pulsation in machine operation loop disappears, the pulse voltage signal of sample resistance disappears simultaneously, the triode saturation conduction of pulse control switch, this moment pulse control switch and comparison circuit the voltage comparator output low level, trigger the field effect transistor electronic switching circuit and end, thereby turn-off dc motor power.

Claims

1. direct current machine stall control device, comprise power supply, direct current machine, field effect transistor electronic switching circuit, sample resistance, pulse control switch, comparison circuit and chip power supply circuit, it is characterized in that described field effect transistor electronic switching circuit comprises that field effect transistor, switching diode and peripheral devices resistance constitute; Direct current machine, field effect transistor electronic switching circuit and sample resistance three series connection, direct current machine is connected with power supply through the field effect transistor electronic switching circuit; Pulse control switch and comparison circuit are connected to sample resistance, the comparison output of pulse control switch and comparison circuit is connected with the field effect transistor control end of field effect transistor electronic switching circuit, pulse control switch and comparison circuit control field effect transistor electronic switching circuit, the break-make of field effect transistor electronic switching circuit control dc motor power.

2. direct current machine stall control device according to claim 1 is characterized in that described pulse control switch and comparison circuit comprise that triode, voltage comparator and peripheral devices resistance, electric capacity constitute; The output of triode is connected with the input of voltage comparator, and the output of voltage comparator connects the field effect transistor control end through switching diode.

3. direct current machine stall control device according to claim 1 is characterized in that described pulse control switch and comparison circuit adopt the single chip machine controlling circuit that can realize pulse control switch and comparing function.