CN201156713Y - DC motor controller of running machine - Google Patents

Abstract

The utility model relates to the technological field of running machine, in particular to a DC motor controller of the running machine. The running machine comprises a single chip, a rectification circuit, a transformer, a control source circuit, an electronic-watch rectifying filter circuit, a motor drive circuit, a motor over-current protection circuit, a lifting motor control and detection circuit which is connected with the single chip, a short-circuit detection circuit of power tube which is used for preventing the high-speed operation of the motor caused by the short circuit of the power circuit, a relay, and a relay drive circuit which is used for driving the relay. The short-circuit detection circuit of power tube is arranged between the motor and the single chip; the single chip detects the voltage of the power tube at the frequency of 16KHZ; when the voltage is zero, the single chip immediately cuts off the signal which is transmitted to the relay drive circuit so as to disconnect the relay; the voltage of the motor becomes zero; and the structure prevents the personnel from damages as a result of the sudden acceleration of the motor.

Description

Treadmill d.c. motor controller

Technical field:

The utility model relates to the treadmill technical field, especially a kind of treadmill d.c. motor controller.

Background technology:

Treadmill is as a kind of body building product, and its safety factor is crucial, and is used to control the d.c. motor controller of treadmill motor, and the safety factor of treadmill is had direct influence.Existing treadmill d.c. motor controller, its power tube and motor are generally and are connected in series, when power tube short circuit for a certain reason, the direct voltage that then is higher than the specified ceiling voltage of motor can directly be loaded on the motor, make the unexpected high-speed cruising of motor, this moment the user have fall the running that runs up with on danger, there is bigger potential safety hazard, and, mostly existing treadmill d.c. motor controller is to adopt analog form to detect data and control motor, the data error of its detection is bigger, the Stability Control of motor speed is got bad, and power consumption is big.

The utility model content:

The purpose of this utility model is exactly the deficiency that exists at prior art and a kind of treadmill d.c. motor controller is provided, and it can prevent that motor from falling off and the situation that causes the user of service to injure occurs.

To achieve these goals, the technical solution adopted in the utility model is:

It comprises single-chip microcomputer; rectification circuit; transformer; the control power circuit; the electronic watch current rectifying and wave filtering circuit; the input of rectification circuit and transformer is connected to the mains electricity input end; the output of rectification circuit is connected with the power input of motor; the output of transformer is connected with the input of control power circuit and electronic watch current rectifying and wave filtering circuit respectively; the output of control power circuit and electronic watch current rectifying and wave filtering circuit is connected with single-chip microcomputer; it is characterized in that: it also comprises motor drive circuit; the motor current foldback circuit; the lift motor control and the testing circuit that are connected with single-chip microcomputer; be used to prevent cause the power tube short-circuit detecting circuit of motor high-speed cruising because of the power tube short circuit; relay and the relay drive circuit that is used to drive relay; the input of motor drive circuit is connected with single-chip microcomputer; the output of motor drive circuit is connected with the input of motor with the motor current foldback circuit respectively; the output of motor current foldback circuit is connected with single-chip microcomputer; the power tube short-circuit detecting circuit is connected between motor and the single-chip microcomputer; relay is connected between mains electricity input end and the rectification circuit; the input of relay drive circuit is connected with single-chip microcomputer, and its output is connected with relay.

Whether low excessively described single-chip microcomputer and control are provided with between the power circuit and are used to detect line voltage low-tension supply testing circuit.

Be provided with the photoelectricity coupled communication circuit that is used to transmit signal between described single-chip microcomputer and the electronic watch current rectifying and wave filtering circuit.

Described single-chip microcomputer is connected with the motor speed detection circuit that is used for stablizing motor speed.

The utility model beneficial effect is:

The treadmill d.c. motor controller that the utility model provides, it is provided with the power tube short-circuit detecting circuit that is used to prevent cause because of the power tube short circuit motor high-speed cruising between motor and single-chip microcomputer, single-chip microcomputer is with the voltage of the frequency detecting power tube of 16KHZ, in case finding this voltage is zero, single-chip microcomputer is immediately the signal cut of exporting to relay drive circuit, to disconnect relay, make the voltage vanishing on the motor, thereby prevent motor from quickening suddenly and the situation that causes the user of service to injure occurs; Be provided with the photoelectricity coupled communication circuit that is used to transmit signal between described single-chip microcomputer and the electronic watch current rectifying and wave filtering circuit, the mode that it adopts the communications codes transmitted in both directions is handled chip microcontroller digitlization detection, control and wrong intelligent alarm; Described single-chip microcomputer is connected with the motor speed detection circuit that is used for stablizing motor speed, and motor speed remains unchanged when making motor zero load and load, and promptly the user can keep the stable of motor speed when running.

Description of drawings:

Accompanying drawing 1 is a block diagram of the present utility model;

Accompanying drawing 2 is circuit theory diagrams of motor drive circuit of the present utility model;

Accompanying drawing 3 is circuit theory diagrams of motor current foldback circuit of the present utility model;

Accompanying drawing 4 is circuit theory diagrams of lift motor control of the present utility model and testing circuit;

Accompanying drawing 5 is circuit theory diagrams of rectification circuit of the present utility model, power tube short-circuit detecting circuit, relay drive circuit;

Accompanying drawing 6 is circuit theory diagrams of low-tension supply testing circuit of the present utility model;

Accompanying drawing 7 is circuit theory diagrams of photoelectricity coupled communication circuit of the present utility model;

Accompanying drawing 8 is circuit theory diagrams of motor speed detection circuit of the present utility model.

Embodiment:

Below in conjunction with accompanying drawing the utility model is further described; see shown in the accompanying drawing 1; the treadmill d.c. motor controller that the utility model provides comprises single-chip microcomputer; rectification circuit 1; transformer; control power circuit 2; electronic watch current rectifying and wave filtering circuit 3; motor drive circuit 4; motor current foldback circuit 5; the lift motor control and the testing circuit 6 that are connected with single-chip microcomputer; be used to prevent cause the power tube short-circuit detecting circuit 7 of motor high-speed cruising because of the power tube short circuit; relay and the relay drive circuit 8 that is used to drive relay; wherein the input of rectification circuit 1 and transformer is connected to the mains electricity input end; the output of rectification circuit 1 is connected with the power input of motor; the output of transformer is connected with the input of control power circuit 2 and electronic watch current rectifying and wave filtering circuit 3 respectively; the output of control power circuit 2 and electronic watch current rectifying and wave filtering circuit 3 is connected with single-chip microcomputer; the input of motor drive circuit 4 is connected with single-chip microcomputer; the output of motor drive circuit 4 is connected with the input of motor with motor current foldback circuit 5 respectively; the output of motor current foldback circuit 5 is connected with single-chip microcomputer; power tube short-circuit detecting circuit 7 is connected between motor and the single-chip microcomputer; relay is connected between mains electricity input end and the rectification circuit 1; the input of relay drive circuit 8 is connected with single-chip microcomputer, and its output is connected with relay.

With reference to the accompanying drawings 2, described motor drive circuit 4 comprises drive integrated circult U8, power tube Q7, it produces pulse-width signal by single-chip microcomputer U4, send pulse-width signal to motor by moving integrated circuit U8 and power tube Q7, speed with governor motor, positive and negative terminal at motor is parallel with anti-phase fast recovery diode D12, makes in the storage of motor inside to discharge when pulse-width signal disconnects.

With reference to the accompanying drawings 3; described motor current foldback circuit 5 comprises resistance R T2, comparison operation integrated circuit U9B; its output out connects the S end of power tube Q7; at the resistance R T2 that flows through on the circuit of motor 0.01 ohm of polyphone; then flow through this resistance equally and produce a voltage by the electric current in the motor; this voltage is input to single-chip microcomputer U4 after by comparison operation integrated circuit U9B; single-chip microcomputer U4 judges whether overcurrent of motor by detecting this signal, thereby the protection motor is unlikely to over proof electric current and burns.

With reference to the accompanying drawings 4, described lift motor control and testing circuit 6 comprise relay R LY2, RLY3, the potentiometer VR1 of lift motor inside, its rotating band electrokinetic potential device VR1 by the lift motor motor internal rotates, give the voltage of potentiometer VR1 two ends 5V, when potentiometer VR1 rotates, the voltage that tap meeting output changes in the middle of it, this voltage is input among the single-chip microcomputer U4, A/D conversion by single-chip microcomputer U4 inside, to determine the position of lift motor, and the relay of the exportable signal controlling lift motor of single-chip microcomputer U4 is controlled at the gradient that the user needs to lift motor.

With reference to the accompanying drawings 5, described power tube short-circuit detecting circuit 7 comprises resistance R 10, R40, R51 and capacitor C 20, this circuit mainly is when preventing power tube because of certain reason short circuit, civil power can all be loaded on the d.c. motor through all voltages behind the rectification circuit 1, cause the unexpected high-speed cruising of motor, the situation that causes the user to fall occurs.Power tube short-circuit detecting circuit 7 is actual to be the pressure filter circuit that is connected on power tube Q7 and motor negative pole place, and voltage herein is input to single-chip microcomputer U4, single-chip microcomputer U4 is with this voltage of frequency detecting of 16KHZ, in case finding this voltage is zero, single-chip microcomputer U4 is immediately the signal cut of exporting to relay drive circuit 8, to disconnect relay R LY1, make the voltage vanishing on the motor, thereby prevent motor from quickening suddenly and the situation that causes the user to fall occurs.In addition, relay drive circuit 8 adopts charge and discharge system, the signal that is single-chip microcomputer U4 output is not a high-low level, but export a square-wave signal about 4KHZ, this signal drives relay R LY1 by the mode that capacitor C 7 and diode D2, D3 charge to capacitor C 6, has only single-chip microcomputer U4 output pulse signal just can make last capacitor C 6 charging, to drive relay R LY1, starter has been eliminated the potential safety hazard that motor still moved when single-chip microcomputer U4 crashed like this.

With reference to the accompanying drawings 6; whether low excessively described single-chip microcomputer and control are provided with between the power circuit 2 and are used to detect line voltage low-tension supply testing circuit 21; described low-tension supply testing circuit 21 comprises resistance R 53, R54; voltage stabilizing didoe ZD3; this circuit is exported to the 12V direct voltage of control circuit by detecting transformer; judge whether line voltage is low excessively, if cross low then close motor operation, thereby the protection motor is unlikely to under-voltage operation and burns.

With reference to the accompanying drawings 7, be provided with the photoelectricity coupled communication circuit 31 that is used to transmit signal between described single-chip microcomputer and the electronic watch current rectifying and wave filtering circuit 3, described photoelectricity coupled communication circuit 31 comprises photoelectrical coupler U5, U7, this circuit is by photoelectrical coupler U5, U7 isolation control circuit and electronic watch, make the voltage conforms safety standard on the electronic watch, the mode of communications codes transmitted in both directions is adopted in the signal transmission on electronic watch and the control circuit simultaneously, has avoided adopting between traditional electrical sublist and the control circuit analog signal or pulse-width signal communication like this and the error or the external disturbance that cause.

With reference to the accompanying drawings 8, described single-chip microcomputer is connected with the motor speed detection circuit 9 that is used for stablizing motor speed, described motor speed detection circuit 9 comprises triode Q5, be installed in the photoelectric sensor U6 on the motor, in order to detect the rotating speed of motor, it installs a rotating disk on the rotation axis of motor, and perforate around this rotating disk, when revolution, photoelectric sensor U6 will export 0 or 5V voltage, this voltage is input in the single-chip microcomputer U4, when single-chip microcomputer U4 obtains certain speed command of setting of electronic watch, single-chip microcomputer U4 is by the speed of relatively setting and the motor speed of detection, by the pulse-width signal of the controlled motor correspondence of PID (proportion integration differentiation) algorithm, when zero load or load, can both keep stable speed then thereby control motor.

Certainly, the above only is preferred embodiment of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, is included in the utility model patent claim.

Claims (4)

1; treadmill d.c. motor controller; it comprises single-chip microcomputer; rectification circuit; transformer; the control power circuit; the electronic watch current rectifying and wave filtering circuit; the input of rectification circuit and transformer is connected to the mains electricity input end; the output of rectification circuit is connected with the power input of motor; the output of transformer is connected with the input of control power circuit and electronic watch current rectifying and wave filtering circuit respectively; the output of control power circuit and electronic watch current rectifying and wave filtering circuit is connected with single-chip microcomputer; it is characterized in that: it also comprises motor drive circuit; the motor current foldback circuit; the lift motor control and the testing circuit that are connected with single-chip microcomputer; be used to prevent cause the power tube short-circuit detecting circuit of motor high-speed cruising because of the power tube short circuit; relay and the relay drive circuit that is used to drive relay; the input of motor drive circuit is connected with single-chip microcomputer; the output of motor drive circuit is connected with the input of motor with the motor current foldback circuit respectively; the output of motor current foldback circuit is connected with single-chip microcomputer; the power tube short-circuit detecting circuit is connected between motor and the single-chip microcomputer; relay is connected between mains electricity input end and the rectification circuit; the input of relay drive circuit is connected with single-chip microcomputer, and its output is connected with relay.

2, treadmill d.c. motor controller according to claim 1 is characterized in that: whether low excessively described single-chip microcomputer and control are provided with between the power circuit and are used to detect line voltage low-tension supply testing circuit.

3, treadmill d.c. motor controller according to claim 1 is characterized in that: be provided with the photoelectricity coupled communication circuit that is used to transmit signal between described single-chip microcomputer and the electronic watch current rectifying and wave filtering circuit.

4, treadmill d.c. motor controller according to claim 1 is characterized in that:

Described single-chip microcomputer is connected with the motor speed detection circuit that is used for stablizing motor speed.

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