CN2836861Y

CN2836861Y - Digital controlled driver of electric running machine

Info

Publication number: CN2836861Y
Application number: CN 200520079502
Authority: CN
Inventors: 史富斌; 张奇志; 李琳
Original assignee: Xian Shiyou University
Current assignee: Xian Shiyou University
Priority date: 2005-10-11
Filing date: 2005-10-11
Publication date: 2006-11-15
Anticipated expiration: 2015-10-11

Abstract

The utility model relates to a numerical-control driver for electric running machines, which comprises a rectification circuit, a filter, a single chip computer, a controlling and driving circuit and a chopper circuit, wherein an AC power supply is rectified by the rectification circuit; the input end of the filter is connected with the rectification circuit; a complete machine is controlled by the single chip computer; the input end of the controlling and driving circuit is connected with the single chip computer; the input end of the chopper circuit is connected with the filter and the controlling and driving circuit. The numerical-control driver for electric running machines also comprises an actuator of which the input end is connected with the chopper circuit. Compared with the existing burst-proof protecting devices for electric running machines, the numerical-control driver for electric running machines has the advantages of reasonable design, simple structure, small size, good use effect, safety, low product cost, high control precision, strong flexibility and adaptability, self-check function, etc. The numerical-control driver for electric running machines can be popularized to use on electric running machines of body-building apparatuses at places, such as families, gymnasiums, hotels, etc.

Description

The numerical control driver of treadmill

Technical field

The utility model belongs to the technique with the apparatus field of taking exercises privileged site, is specifically related to be used for movable tape loop of having of leg or pin or cylinder, makes the people carry out running in place thereon.

Background technology

In order to improve the healthy of people, sports ground in public place of entertainment, park and the unit in city is provided with health and fitness facilities, many families have also bought health and fitness facilities, treadmill is a kind of of health and fitness facilities, treadmill is divided into direct current treadmill and AC driving type treadmill by the classification of motor power, and the direct current treadmill relies on electronic controller to produce variable DC voltage the speed of direct current treadmill is regulated.The direct current treadmill has advantages such as volume is little, low in energy consumption, in light weight, and its security, reliability are the current focal issues of paying close attention to the most of manufacturer and body builder.The electronic controller of direct current treadmill adopts the 220V alternating current after rectifier bridge rectification, filtering, under the effect of controller, produce the conducting and the shutoff of pulse width modulated wave control FET, produce variable DC voltage, realize the speed control of treadmill, have operate steadily, advantage such as good speed adjustment features, on treadmill market, occupy sizable share.

PDM keyer is to utilize the conducting of semiconductor power device and shutoff that DC voltage is become the potential pulse row, by controlling a kind of controller that voltage pulse width or cycle reach transformation or variable voltage variable frequency, have characteristics such as cost is low, control performance is superior.Difference according to the controller control mode is divided into analog controller and digitial controller, and the direct current treadmill on the market mostly pulse width modulated wave driver of application simulation control formula is regulated, and drives the running of direct current treadmill.This type of drive is practical, economical, but there is the circuit complexity in analog controller, the flexibility and the bad adaptability of control, system debug and upgrading difficulty, shortcomings such as the installation debugging work load is big, the more important thing is the open loop operation that causes at the speed feedback channel failure, system interference, can cause departure under the situations such as the characteristic drift of analog device, can make the voltage that is loaded on the motor surpass its rated value in severe case, cause motor acceleration suddenly and produce " quick-fried dashing ", prepare inadequately as the body builder in this case, tend to fall down, the equipment overload operation also can influence its service life simultaneously.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the shortcoming of above-mentioned running equipment, provide a kind of reasonable in design, simple in structure, volume is little, result of use good, safe and reliable, product cost is low, control accuracy is high, flexibility and adaptability strong, possess the numerical control driver of the treadmill of self-checking function.

Solving the problems of the technologies described above the technical scheme that is adopted is that it comprises: the rectification circuit that AC power is carried out rectification; Wave filter, input termination rectification circuit; The single-chip microcomputer that complete machine is controlled; Control and drive circuit, input connects single-chip microcomputer; Chopper circuit, input termination wave filter, control and drive circuit; It also comprises actuator, input termination chopper circuit.

Control of the present utility model and drive circuit are: positive pole, 5 pin ground connection, 6 pin that positive pole, 7 pin and 8 pin that the P0.1 end, 2 pin that 3 pin of integrated circuit U2 meet integrated circuit U1 connects the 5V power supply by R2 connect the 15V power supply connect the base stage of triode Q2 and triode Q3 by R4, the positive pole of the termination 15V power supply of R3, the end of another termination C5, the positive pole of the termination 15V power supply of C6, the other end ground connection of C5 and C6, the colelctor electrode of triode Q2 connects the positive pole of 15V power supply, the grounded collector of triode Q3, the emitter stage of triode Q2 and triode Q3 connects chopper circuit by R5.

The utility model is compared towards protective device with present the explosion-proof of treadmill; have reasonable in design, simple in structure, volume is little, result of use good, safe and reliable, product cost is low, control accuracy is high, flexibility and adaptability strong, possess advantage such as self-checking function, can on the treadmill of the health and fitness facilities of family, gymnasium, hotels and other places, promote the use of.

Description of drawings

Fig. 1 is an electrical principle block diagram of the present utility model.

Fig. 2 is an electronic circuit schematic diagram of the present utility model.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.

Fig. 1 has provided electrical principle block diagram of the present utility model, referring to Fig. 1.In Fig. 1, the treadmill numerical control driver of present embodiment is to be connected and composed by rectification circuit, wave filter, chopper circuit, executive circuit, single-chip microcomputer, control and drive circuit.The input termination rectification circuit of wave filter, the input of control and drive circuit connects single-chip microcomputer, the input termination wave filter of chopper circuit and control and drive circuit, output termination executive circuit.

In Fig. 2, the rectification circuit of present embodiment is connected and composed by diode D1～diode D4, C1, C2, coil L1, coil L2, K switch 1.K switch 1 and coil L1 series connection are on the 220v live wire, coil L2 series connection is on the 220v ground wire, coil L1, coil L2 are induction coil, C1, C2 are filter capacitor, diode D1～diode D4 connects into bridge rectifier, and the 220v alternating current becomes dc source through the bridge rectifier rectification again and outputs to wave filter after filtering.

The wave filter of present embodiment is connected and composed by C3, C4.The termination bridge rectifier diode D3 of C3 and C4 and the positive pole of diode D4 and negative pole and the chopper circuit of executive circuit, another terminating diode D1 and diode D2.Wave filter will be after rectification the clutter of dc source filter.

The single-chip microcomputer of present embodiment is made of integrated circuit U1.The model of integrated circuit U1 is P87LPC768.Control of P0.1 termination and the drive circuit of integrated circuit U1.

The control of present embodiment and drive circuit are connected and composed by integrated circuit U2, triode Q2, triode Q3, R2～R5, C5～C6, and the model of integrated circuit U2 is 6N137.Positive pole, 5 pin ground connection, 6 pin that positive pole, 7 pin and 8 pin that the P0.1 end, 2 pin that 3 pin of integrated circuit U2 meet integrated circuit U1 connects the 5V power supply by R2 connect the 15V power supply connect the base stage of triode Q2 and triode Q3 by R4, the positive pole of the termination 15V power supply of R3, the end of another termination C5, the positive pole of the termination 15V power supply of C6, the other end ground connection of C5 and C6.The colelctor electrode of triode Q2 connects the positive pole of 15V power supply, the grounded collector of triode Q3, and the emitter stage of triode Q2 and triode Q3 connects chopper circuit by R5.

The chopper circuit of present embodiment is connected and composed by FET Q1, diode D5.The negative pole that the other end, the source electrode that the drain electrode of FET Q1 meets C3 and C4 meets the positive pole of diode D5 and executive circuit, grid and diode D5 connects the emitter stage of triode Q2 and triode Q3 by R5.

The executive circuit of present embodiment is connected and composed by motor M, diode D6, R1.The termination C3 of the end of the positive pole of diode D6 and R1 and motor M and the end of C4, the source electrode of another termination effect pipe Q1 of the negative pole of diode D6 and the other end of R1 and motor M.

Operation principle of the present utility model is as follows:

The EMI FILTER filtering that the 220v AC power is formed through C1, C2, L1, L2, the bridge rectifier rectification that connects through diode D1～diode D4 again, change the 220v alternating current into direct current, and through C3, C4 filtering harmonic wave, output voltage is to the drain electrode of field-effect pipe Q1, diode D6 is used for suppressing the influence of motor M back-emf, guarantees its operate as normal.The pulse width modulated wave that the P0.1 port of integrated circuit U1 produces drives FET Q1 after isolating, amplify through photoelectricity, controls its conducting and shutoff, and the P1.2 port of integrated circuit U1 is connected with integrated circuit U2, and realization speed detects in real time.The current signal of motor M is sampled to motor M armature supply by integrated circuit U1 from the P1.2 port that IN2 is linked into integrated circuit U1.The rotating speed of motor M records the back feeds back to integrated circuit U1 from IN1 P1.3 by velocity sensor, integrated circuit U1 with the rotating speed that records and body builder's speed setting value relatively after, send the pulse width modulated wave of particular duty cycle by the P0.1 mouth of integrated circuit U1, this pulse width modulated wave signal through light that integrated circuit U2, R3, C5, C6 form after the push-pull driver circuit that circuit and triode Q2, triode Q3 form drives, conducting and the shutoff of control FET Q1, with commutating voltage copped wave, finish driving, speed governing task.

When the speed feedback passage broke down under the running status, integrated circuit U1 forbade sending pulse width modulated wave, prevented to make DC chopped-wave voltage surpass " quick-fried dashing " that motor M rated voltage causes because of the open loop operation causes the full conducting of FET Q1; While is according to the rated speed value of treadmill, set the polarity of pulse width modulated wave dutycycle by integrated circuit U1, realize pulse width modulated wave " dead band ", prevent " quick-fried dash " phenomenon of causing because of reasons such as humorous wave interference, device failure, effectively prevent the generation of various faults or abnormal operating condition, guarantee the safe operation of motor M.

Claims

1, a kind of numerical control driver of treadmill is characterized in that it comprises:

AC power is carried out the rectification circuit of rectification;

Wave filter, input termination rectification circuit;

The single-chip microcomputer that complete machine is controlled;

Control and drive circuit, input connects single-chip microcomputer;

Chopper circuit, input termination wave filter, control and drive circuit;

It also comprises actuator, input termination chopper circuit.

2, numerical control driver according to the described treadmill of claim 1, it is characterized in that said control and drive circuit are: 3 pin of integrated circuit U2 connect the P0.1 end of integrated circuit U1,2 pin connect the positive pole of 5V power supply by R2,7 pin and 8 pin connect the positive pole of 15V power supply, 5 pin ground connection, 6 pin connect the base stage of triode Q2 and triode Q3 by R4, the positive pole of the termination 15V power supply of R3, the end of another termination C5, the positive pole of the termination 15V power supply of C6, the other end ground connection of C5 and C6, the colelctor electrode of triode Q2 connects the positive pole of 15V power supply, the grounded collector of triode Q3, the emitter stage of triode Q2 and triode Q3 connects chopper circuit by R5.