CN201450480U

CN201450480U - Series direct-current motor control system capable of solving problem of coasting down slope

Info

Publication number: CN201450480U
Application number: CN200920032401XU
Authority: CN
Inventors: 刘大椿; 胡岩长; 殷志华; 杨操; 刘洪�
Original assignee: XI'AN UNITE MOTOR CONTROL TECHNOLOGY Co Ltd
Current assignee: XI'AN UNITE MOTOR CONTROL TECHNOLOGY Co Ltd
Priority date: 2009-03-31
Filing date: 2009-03-31
Publication date: 2010-05-05
Anticipated expiration: 2019-03-31

Abstract

The utility model relates to a series direct-current motor control system capable of solving the problem of coasting down a slope. When a hand brake is not used and an electric vehicle coasts down a slope due to gravity, the conventional series direct-current motor controller cannot detect the coasting signal, and therefore cannot take a braking measure to stop the coasting of the electric vehicle, which can lead to a danger. The series direct-current motor control system comprises a series direct-current motor with a Hall disk and a magnetic cylinder, a controller, a drive circuit board and a contactor; the Hall disk is fixed on the end cover of the series direct-current motor, the magnetic cylinder is fixed on the shaft of the series direct-current motor, the Hall disk is in parallel with the magnetic cylinder, and is provided with two Hall position sensors (U and V), and signals are transmitted to the controller via a Hall wire. Consequently, when the series direct-current motor operates in four quadrants, i.e. forward acceleration, reversal acceleration, forward braking and reversal braking, the series direct-current motor control system can implement energy feedback in the process of the braking of the series direct-current motor, thus solving the problem of coasting down a slope.

Description

Can solve the series excitation DC motor control system of the car of slide in the slope

Technical field

The utility model belongs to series excitation DC motor control technology field, is a kind of series excitation DC motor control system that can solve the car of slide in the slope specifically, and main application is forklift-walking control, electric golf cart and Sightseeing Trolley.

Background technology

At present, the mode that tradition series excitation DC motor controller adopts power MOSFET tube to connect with series excitation DC motor, by regulating the duty ratio of power MOSFET tube, can change armature supply, reach the purpose of control series excitation DC motor torque, by control contactor realize series excitation DC motor just/counter-rotating.Traditional series excitation DC motor control system has following shortcoming:

Under without hand brake situation, can't solve the car of slide in slope problem, electric motor car because action of gravity when down slipping, detects less than slipping the car signal, can't be taked brake measure to prevent electric motor car to glide to produce dangerous on the slope.

The utility model content

It is a kind of efficient that the utility model provides, and easy for installation, cost is low, and does not reduce the series excitation DC motor control system that can solve the car of slide in the slope of overall system performance index.

In order to achieve the above object, the technical solution adopted in the utility model is:

Can solve the series excitation DC motor control system of the car of slide in the slope, its special character is: described series excitation DC motor control system comprises series excitation DC motor, controller, drive circuit board, the contactor that has Hall disc and magnetic cylinder; Described Hall disc is fixed on the end cap of series excitation DC motor, and the magnetic cylinder is fixed on the axle, and Hall disc is parallel with the magnetic cylinder, and described Hall disc is provided with two hall position sensor U and V, and signal sends controller to by the Hall line.

Above-mentioned drive circuit board constitutes the full-bridge control circuit by four groups of power MOSFET tubes.

Above-mentioned hall position sensor detects series excitation DC motor when just changeing, the contactor action, controller output signal is given drive circuit board, closed two groups of power MOSFET tubes, make series excitation DC motor be in generating state, stop the series excitation DC motor running, when hall position sensor detects series excitation DC motor and shuts down, contactor disconnects, and two groups of power MOSFET tubes turn-off; When hall position sensor detects series excitation DC motor in counter-rotating, controller output signal is given drive circuit board, closed two groups of power MOSFET tubes, make series excitation DC motor be in generating state, stop the series excitation DC motor running, when hall position sensor detected series excitation DC motor and shuts down, contactor disconnected, and two groups of power MOSFET tubes turn-off.

The utility model is with respect to prior art, and its advantage is as follows:

The series excitation DC motor control system that can solve the car of slide in the slope can realize: series excitation DC motor is just changeing acceleration, and counter-rotating is quickened, and the positive transformation of ownership is moving, four quadrant operations of counter-rotating braking, the energy feedback when realizing the series excitation DC motor braking; Solve the slope and go up the car problem of slipping.

Description of drawings:

Fig. 1 is the series excitation DC motor structural representation;

Fig. 2 detects key diagram for hall sensor signal;

Fig. 3 is just changeing key diagram for series excitation DC motor;

Fig. 4 is series excitation DC motor counter-rotating key diagram;

Fig. 5 is series excitation DC motor control system figure;

Fig. 6 is a series excitation DC motor control system theory diagram.

1-Hall disc, 2-magnetic cylinder, 3-series excitation DC motor, 4-controller, 5-drive circuit board, 6-contactor, 7-end cap, 8-Hall line, 9-hall position sensor U, 10-hall position sensor V, the 1st group of power MOSFET tube of 11-, the 2nd group of power MOSFET tube of 12-, the 3rd group of power MOSFET tube of 13-, the 4th group of power MOSFET tube of 14-, 15-series excitation DC motor armature winding, 16-series excitation DC motor excitation winding.

Embodiment

Referring to shown in Figure 1, Hall disc 1 is fixed on the end cap 7 of series excitation DC motor 3, magnetic cylinder 2 is fixed on the axle, and Hall disc 1 is parallel with magnetic cylinder 2, and axle is when rotating, magnetic cylinder 2 is also in rotation thereupon, the fixed-site of Hall disc 1 is constant, and Hall disc 1 sends signal to controller 4 by the Hall line, and two hall position sensor U and V are set on the Hall disc 1, when hall position sensor in N following time extremely, controller 4 detected signals are " 1 "; When hall position sensor in S following time extremely, controller 4 detected signals are " 0 ".Like this, see Hall disc 1 from end cap 7, when series excitation DC motor 3 direction of rotation differences, controller 4 detected hall position sensor signals also can be different.

Referring to Fig. 6, Fig. 6 is a series excitation DC motor control system theory diagram.

The concrete job analysis of control system: when controller 4 receives run signal, controller 4 is in standby condition, can control the series excitation DC motor operation by just given/counter-rotating, acceleration, brake signal, otherwise controller 4 will not receive any control signal.The following one of four states of controller 4 main operations:

Just changeing acceleration: when controller 4 receive just change with signal for faster after, the 1st group of power MOSFET tube 11 closures, the contactor action, controller 4 recently increases the series excitation DC motor electric current by the duty that increases the 4th group of power MOSFET tube 14, and series excitation DC motor is in just changes acceleration mode.

Counter-rotating is quickened: after controller 4 receives counter-rotating and signal for faster, the 3rd group of power MOSFET tube 13 closures, the contactor action, controller 4 recently increases the series excitation DC motor armature supply by the duty that increases the 2nd group of power MOSFET tube 12, makes series excitation DC motor be in the counter-rotating acceleration mode.

The positive transformation of ownership is moving: when controller 4 receive just change with brake signal after, 1st, 4 groups of

power MOSFET tubes

11,14 turn-off, the contactor action, make the sense of current in the series excitation DC motor excitation winding constant, and armature supply is reverse, make series excitation DC motor be in generating state, the 3rd group of power MOSFET tube 13 closures, by regulating the duty cycle adjustment size of current of the 2nd group of power MOSFET tube 12, when the 2nd group of MOSFET pipe 12 turn-offs, the series excitation DC motor winding constitutes booster circuit, with the anti-storage battery of giving of electric energy, reaches the purpose of regenerative braking.

Counter-rotating braking: after controller 4 receives counter-rotating and brake signal, 2nd, 3 groups of

power MOSFET tubes

12,13 turn-off, the contactor action, make the sense of current in the series excitation DC motor excitation winding 16 constant, and armature supply is reverse, make series excitation DC motor be in generating state, the 1st group of power MOSFET tube 11 closures, by regulating the duty cycle adjustment size of current of the 4th group of power MOSFET tube 14, when the 4th group of MOSFET pipe 14 turn-offs, the series excitation DC motor winding constitutes booster circuit, with the anti-storage battery of giving of electric energy, reaches the purpose of regenerative braking.

Referring to shown in Figure 2, by detecting the hall position sensor signal, can judge series excitation DC motor just/counter-rotating, when hall position sensor U extremely descends at S, V is in N following time extremely, controller 4 detected U, V signal are " 01 ", controller 4 will by detect next position signalling judge electric motor car just/counter-rotating.

Referring to Fig. 3, when hall position sensor U and V all in N following time extremely, controller 4 detected U, V signal are " 11 ", controller 4 judges that series excitation DC motors are for just changeing;

Referring to shown in Figure 4, when hall position sensor U and V all in S following time extremely, controller 4 detected U, V signal are " 00 ", controller 4 judges that series excitation DC motors are counter-rotating.

Referring to Fig. 5, when stopping at, electric motor car do not use the hand brake on the slope, and electric motor car does not receive run signal, and the electric motor car gravitate is when gliding automatically, hall position sensor detects series excitation DC motor when just changeing, the contactor action, controller 4 outputs signal to drive circuit board 5, closed two groups of

power MOSFET tubes

12,13, make series excitation DC motor be in generating state, stop series excitation DC motor 3 runnings, when hall position sensor detects series excitation DC motor and shuts down, contactor disconnects, two groups of

power MOSFET tubes

12,13 turn-off; When hall position sensor detects series excitation DC motor in counter-rotating, controller 4 outputs signal to drive circuit board 5, closed two groups of

power MOSFET tubes

11,14, make series excitation DC motor be in generating state, stop the series excitation DC motor running, when hall position sensor detected series excitation DC motor and shuts down, contactor disconnected, and two groups of

power MOSFET tubes

11,14 turn-off.

In sum, the related series excitation DC motor control system of the utility model has solved the problem that danger can appear in the insurmountable car of slide in the slope of traditional series excitation DC motor control system.

Claims

1. can solve the series excitation DC motor control system of the car of slide in the slope, it is characterized in that: described series excitation DC motor control system comprises series excitation DC motor (3), controller (4), drive circuit board (5), the contactor (6) that has Hall disc (1) and magnetic cylinder (2); Described Hall disc (1) is fixed on the end cap (7) of series excitation DC motor, magnetic cylinder (2) is fixed on the axle, and Hall disc (1) is parallel with magnetic cylinder (2), and described Hall disc (1) is provided with two hall position sensor U and V (9,10), signal sends controller (4) to by Hall line (8).

2. the series excitation DC motor control system that can solve the car of slide in the slope according to claim 1, it is characterized in that: described drive circuit board (5) constitutes the full-bridge control circuit by the 1st group of power MOSFET tube (11), the 2nd group of power MOSFET tube (12), the 3rd group of power MOSFET tube (13) and the 4th group of power MOSFET tube (14).

3. the series excitation DC motor control system that can solve the car of slide in the slope according to claim 2, it is characterized in that: described hall position sensor detects series excitation DC motor when just changeing, the contactor action, controller (4) outputs signal to drive circuit board, closed the 2nd group of power MOSFET tube (12) and the 3rd group of power MOSFET tube (13), make series excitation DC motor be in generating state, stop the series excitation DC motor running, when hall position sensor detects series excitation DC motor and shuts down, contactor disconnects, and the 2nd group of power MOSFET tube (12) and the 3rd group of power MOSFET tube (13) turn-off; When hall position sensor detects series excitation DC motor in counter-rotating, controller (4) outputs signal to drive circuit board, closed the 1st group of power MOSFET tube (11) and the 4th group of power MOSFET tube (14), make series excitation DC motor be in generating state, stop the series excitation DC motor running, when hall position sensor detected series excitation DC motor and shuts down, contactor disconnected, the 1st group of power MOSFET tube (11) and the 4th group of power MOSFET tube (14) shutoff.