CN201528313U - Speed regulating circuit with variable frequency and variable pulse width of AC series motor as well as soy-bean milk machine - Google Patents
Speed regulating circuit with variable frequency and variable pulse width of AC series motor as well as soy-bean milk machine Download PDFInfo
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- CN201528313U CN201528313U CN2009202382965U CN200920238296U CN201528313U CN 201528313 U CN201528313 U CN 201528313U CN 2009202382965 U CN2009202382965 U CN 2009202382965U CN 200920238296 U CN200920238296 U CN 200920238296U CN 201528313 U CN201528313 U CN 201528313U
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Abstract
The utility model relates to a speed regulating circuit with variable frequency and variable pulse width of an AC series motor, which comprises a rectifying circuit, a strong and weak power barrier device, a power switching tube, an afterflow tube and a CPU, wherein the rectifying circuit supplies DC control power supply for the power switching tube, the strong and weak power barrier device is connected with the control end of the power switching tube, a pulse control signal which is generated by the CPU and has variable frequency or variable pulse width is input into the strong and weak power barrier device to control the work of the strong and weak power barrier device, thus triggering the conduction of the power switching tube; the power switching tube is accessed into a power supply circuit of the motor to lead the pulse control signal generated by the CPU to realize speed regulation with variable frequency or variable pulse width to the motor; and the afterflow tube is connected with the motor to form an afterflow loop to lead energy stored in an inductor of the motor to discharge to keep pushing the continuous operation of the motor. The speed regulating circuit adopts a DC-AC series motor, and controls the speed regulation by the power switching tube with variable frequency and variable pulse width, so as to lead the motor speed to be smooth and stable, the electromagnetic noise to be low, the iron loss to be low, and the efficiency to be high; and compared with commonly adopted bidirectional silicon controlled stepless speed regulating, the performance is greatly improved.
Description
Technical field
The present invention relates to a kind of speed-regulating control circuit that exchanges series excited machine frequency conversion variable pulse width, and the soy bean milk making machine of this alignment circuit is installed.
Background technology
Series excited machine goes for the AC and DC power supply, and starting torque is big, the rotating speed height, and especially under the DC driven mode, rotating speed is higher.The motor of this type can be good at satisfying the needs of soy bean milk making machine.In order to realize the speed regulating control to the series excited machine in the soy bean milk making machine, the alignment circuit at motor for soymilk machine control has appearred in the prior art.For example China Patent No. is the CN200820043323.9 utility model patent, the day for announcing is on November 12nd, 2008, a kind of stepless speed regulation soy bean milk making machine is disclosed, comprise head, slurry filling container, motor is installed on the head, motor is by single-chip microcomputer intelligence control circuit control running, the controllable silicon of serial connection one control motor speed in the main circuit of described motor (M), an I/O output of described single-chip microcomputer is electrically connected through the control utmost point of resistance (R1) with optocoupler controllable silicon (U1), the negative electrode of optocoupler controllable silicon (U1) connects the control utmost point of controllable silicon (TRI), and negative electrode series resistor (R2) back of optocoupler controllable silicon (U1) is electrically connected with power supply circuits.This scheme realizes the stepless speed regulation to motor by the conducting of machine controllable silicon.China Patent No. is a CN200810198161.0 application for a patent for invention text for another example, open day is on January 28th, 2009, a kind of circuit of pulping machine is disclosed, comprise control unit, performance element and power subsystem, described control unit comprises central processing element, described performance element comprises motor and electric heater unit in parallel, and wherein motor is in series with a bidirectional triode thyristor, and electric heater unit is in series with second relay; Described central processing element is connected with bidirectional triode thyristor by the optocoupler control circuit, and described central processing element is connected with electric heater unit by second control relay circuit; Described control unit comprises and is connected the zero cross detection circuit that is used to detect power supply signal with central processing element.Since in the circuit bidirectional triode thyristor and zero cross detection circuit are arranged, thus can realize stepless speed regulation, with the purpose that reaches slow start, stops or stirring at a slow speed at a slow speed.In above-mentioned two schemes, the switch module of employing all is controllable silicons, with the speed governing of controllable silicon principle, makes motor speed inhomogeneous, the motor dynamic loading is big, causes electromechanical shock big, and electromagnetic noise is big, and electric efficiency is low, the consume heating is serious, the temperature height, and the motor rapid wear, reliability is relatively poor.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art, provides a kind of motor rotation that can make smoothly stable, and electromagnetic noise is little, the alignment circuit of the series excited machine frequency conversion variable pulse width that efficient is high.
It is smoothly stable that another technical problem to be solved in the utility model provides a kind of motor speed, and electromagnetic noise is little, the soy bean milk making machine that efficient is high.
A kind of alignment circuit that exchanges series excited machine frequency conversion variable pulse width that provides according to the utility model, comprise rectification circuit, the strong and weak electricity isolating device, power switch pipe (IGBT, field effect transistor etc.), continued flow tube and CPU, described rectification circuit provides DC control supply to described power switch pipe, described strong and weak electricity isolating device connects the control end of power switch pipe, the variable frequency that described CPU produces or the pulse control signal of variable impulse width are input in the described strong and weak electricity isolating device, control the work of described strong and weak electricity isolating device, thereby trigger the conducting of described power switch pipe, described power switch pipe inserts in the power supply circuits of motor, the pulse control signal that makes described CPU produce is realized the speed governing of frequency conversion or variable pulse width to motor, described continued flow tube and motor are connected to form continuous current circuit, make the inductive energy storage in the motor discharge, keeping motor remains in operation, motor speed is level and smooth, do not have and impact, electric energy is converted into mechanical energy, improved motor acting ability, motor becomes direct current supply by interchange simultaneously, the motor iron loss has very big reducing, and electric efficiency further improves.
A kind of alignment circuit that exchanges series excited machine frequency conversion variable pulse width according to the utility model provides also has following attached technical characterictic:
Described strong and weak electricity isolating device adopts optocoupler, and described optocoupler is connected the control end of described power switch pipe, and the pulse control signal output of described CPU is connected with the control end of described optocoupler.
Be connected in an end of described power switch pipe behind described continued flow tube and the motor parallel, close at described power switch pipe and have no progeny, described continued flow tube and motor constitute continuous current circuit.
Described continued flow tube is a fast recovery diode.
After described rectification circuit, be provided with filter circuit.
Be provided with voltage stabilizing circuit after described filter circuit, described voltage stabilizing circuit becomes the control power supply of stable DC as described power switch pipe with pulsating direct current.
Also include switch relay, described switch relay inserts in the motor circuit, and the connection of described switch relay is early than the connection of described power switch pipe, and the disconnection of described switch relay is later than the disconnection of described power switch pipe IGBT.
Described CPU adopts single-chip microcomputer.
A kind of soy bean milk making machine that provides according to the utility model, comprise housing and main frame, described main frame includes motor, control circuit by described motor-driven cutter head and the described machine operation of control, described motor is for exchanging series excited machine, be provided with alignment circuit in the described control circuit, described alignment circuit comprises rectification circuit, the strong and weak electricity isolating device, power switch pipe, continued flow tube and CPU, described rectification circuit provides DC control and working power to described power switch pipe, described strong and weak electricity isolating device connects the control end of power switch pipe, the variable frequency that described CPU produces or the pulse control signal of variable impulse width are input in the described strong and weak electricity isolating device, control the work of described strong and weak electricity isolating device, thereby trigger the conducting of described power switch pipe, described power switch pipe inserts in the power supply circuits of motor, the pulse control signal that makes described CPU produce is realized the speed governing of frequency conversion or variable pulse width to motor, described continued flow tube and motor are connected to form continuous current circuit, make inductive energy storage discharge in the motor keep motor and remain in operation.
A kind of soy bean milk making machine that provides according to the utility model also has following attached technical characterictic:
Described main frame also is provided with heating component, and described heating component is connected with described alignment circuit, and described alignment circuit is realized the power adjustments of variable ratio frequency changer or variable impulse width to described heating component.
A kind of alignment circuit that exchanges series excited machine frequency conversion variable pulse width that provides according to the utility model compared with prior art has following advantage: at first, the utility model adopts the AC/DC series excited machine, control by power switch pipe frequency conversion variable pulse width, motor speed is smoothly stable, electromagnetic noise is little, the efficient height, bidirectional triode thyristor stepless speed regulation commonly used, performance is greatly improved; Secondly, the utility model is provided with continued flow tube, makes that at power switch pipe continued flow tube and motor constitute continuous current circuit when turn-offing, and continued flow tube makes the inductive energy storage of motor play palingenesis, and the power switch pipe power loss obviously reduces.
A kind of soy bean milk making machine that provides according to the utility model compared with prior art has following advantage: the utility model is applied to above-mentioned alignment circuit in the soy bean milk making machine, make that the motor operation of soy bean milk making machine is more steady, the operation noise reduces, the heating of iron loss small machine is few, temperature reduces, electrical machinery life improves, and electromagnetic disturbance is little, and the complete machine security reliability improves.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Referring to Fig. 1 and Fig. 2, a kind of alignment circuit that exchanges series excited machine frequency conversion variable pulse width in that the utility model provides comprises rectification circuit 1, strong and weak electricity isolating device 4, power switch pipe IGBT5, continued flow tube 6 and CPU.Described CPU adopts single-chip microcomputer.Described rectification circuit 1 provides DC control supply to described power switch pipe IGBT5, described strong and weak electricity isolating device 4 connects the control end G of power switch pipe IGBT, the variable frequency that described CPU produces or the pulse control signal of variable impulse width are input in the described strong and weak electricity isolating device 4, control the work of described strong and weak electricity isolating device 4, thereby trigger the conducting of described power switch pipe IGBT, described power switch pipe IGBT inserts in the power supply circuits of motor 8, the pulse control signal that makes described CPU produce is realized the speed governing of frequency conversion or variable pulse width to motor 8, described continued flow tube 6 is connected to form continuous current circuit with motor 8, makes inductive energy storage discharge in the motor 8 keep motor and remains in operation.The utility model is provided with strong and weak electricity isolating device 4, and described CPU realizes the control for the forceful electric power break-make by the break-make of control strong and weak electricity isolating device 4, can directly use civil power.CPU of the present utility model controls described power switch pipe IGBT indirectly by strong and weak electricity isolating device 4, the variable ratio frequency changer of described CPU output or the pulse signal of variable impulse width can power controlling switching tube IGBT break-make, thereby realization finally reaches the purpose of electric machine speed regulation to the frequency of the power supply of motor 8 or the adjustment of pulsewidth.Alignment circuit of the present utility model is to design at series excited machine, can satisfy the smooth stepless speed-regulating demand of series excited machine.
The utility model is owing to adopt series excited machine, and when described power switch pipe IGBT turn-offed, motor 8 was in power failure state, influences the even running of motor 8.In order to guarantee remaining in operation of motor 8, the utility model has increased continued flow tube 6.Be connected in the end C of described power switch pipe IGBT after described continued flow tube 6 and motor 8 are in parallel, close at described power switch pipe IGBT and have no progeny, described continued flow tube 6 constitutes continuous current circuits with motor 8.Because motor is an inductive load, is made up of resistance and inductance, during pulse high level, power switch pipe IGBT conducting, Vce is zero, electrical power and rotating, while motor inductive energy storage, during pulses low, power switch pipe IGBT turn-offs, and the motor energy storage inductor is to continued flow tube 6 discharges, the sense of current is constant, motor remains in operation, and continued flow tube 6 makes the inductive energy storage of motor play palingenesis, and power switch pipe IGBT power loss obviously reduces.And make that the operation of motor 8 is more steady.
Referring to Fig. 1 and Fig. 2, in the foregoing description that the utility model provides, described continued flow tube 6 is a fast recovery diode.Adopt fast recovery diode can satisfy the quick switching of continuous current circuit, make motor 8 and continued flow tube 6 constitute qualified continuous current circuit, satisfy the operation demand of motor 8, also reduce the power consumption of power switch pipe IGBT to greatest extent.
Referring to Fig. 1 and Fig. 2, in the foregoing description that the utility model provides, described strong and weak electricity isolating device 4 adopts optocoupler, and described optocoupler is connected the control end G of described power switch pipe IGBT, and the pulse control signal output of described CPU is connected with the control end of described optocoupler.The utility model is owing to adopt optocoupler, and making control signal and the mains isolation of CPU has increased fail safe.Certainly, strong and weak electricity isolating device 4 of the present utility model also can adopt transformer, or other forms of strong and weak electricity isolating device.
Referring to Fig. 1 and Fig. 2, in the foregoing description that the utility model provides, after described rectification circuit 1, be provided with filter circuit 2.Be provided with voltage stabilizing circuit 3 after described filter circuit 2, described voltage stabilizing circuit 3 becomes the control power supply of stable DC as described power switch pipe IGBT with pulsating direct current.Described rectification circuit 1 is bridge heap rectification circuit, and the power supply after 2 pairs of rectification circuit 1 rectifications of described filter circuit carries out filtering.And voltage stabilizing is carried out in 3 pairs of rectifications of voltage stabilizing circuit, filtered power supply, satisfies the demand of power switch pipe IGBT for stabilized power supply, makes power switch pipe IGBT better work, and satisfies the needs of speed governing.
Referring to Fig. 1 and Fig. 2, in the foregoing description that the utility model provides, also include switch relay 7, described switch relay 7 inserts in motor 8 circuit, the connection of described switch relay 7 is early than the connection of described power switch pipe IGBT, and the disconnection of described switch relay 7 is later than the disconnection of described power switch pipe IGBT.The break-make of the utility model switch relay 7 is controlled by CPU, because the connection of switch relay 7 is early than the connection of power switch pipe IGBT, switch relay 7 is connected under currentless situation, the disconnection of switch relay 7 is later than the disconnection of power switch pipe IGBT, and switch relay 7 is disconnected under currentless situation.Therefore, switch relay 7 of the present utility model is to move under currentless situation, has reduced the aging ablation of switch relay contact and the disjunction cremate electromagnetic disturbance of contact.This switch relay 7 also can be installed in the mains supply line.
The embodiment of a kind of soy bean milk making machine that provides at the utility model comprises housing and main frame, and described main frame includes motor, by described motor-driven cutter head with control the control circuit of described machine operation, and these parts all are conventional components of soy bean milk making machine.Main feature of the present utility model is that described motor is to exchange series excited machine, is provided with alignment circuit in the described control circuit, and described alignment circuit is the described alignment circuit of the foregoing description.Owing to adopted series excited machine, make that the cutter rotating speed of soy bean milk making machine is higher, move more steadily, better for the pulverizing of beans, the soya-bean milk mouthfeel of making is better.And, more can increase and satisfy the needs of soy bean milk making machine disintegrating process stepless speed regulation owing to adopt the alignment circuit of above-mentioned series excited machine.
Referring to Fig. 1 and Fig. 2, the embodiment of a kind of soy bean milk making machine that provides at the utility model, described main frame also is provided with heating component 10, and described heating component 10 is connected with described alignment circuit, and described alignment circuit is realized the power adjustments of variable ratio frequency changer or variable impulse width to described heating component 10.Also be serially connected with switch relay 9 in the power supply circuits of described heating component 10, by CPU control, the break-make order is identical with switch relay 7, can realize relay zero current break-make equally equally for this switch relay 9.The utility model carries out power adjustments by alignment circuit to heating component 10, makes heating component 10 realize the stepless power adjusting, can better meet the technological requirement that soya-bean milk is added thermal maturation.Improve existing permanent merit element and intermittently heat the Power Regulation method.
Electric Machine Control process of the present utility model is as follows: singlechip CPU is earlier by I/O output control signal, make switch relay 7 contact adhesives, realize the contact zero current turning-on, singlechip CPU I/O output pulse signal is to light lotus root device 4, its pulse increases gradually, make motor realize soft start, the average power of motor increases gradually, reaches required rotating speed.Therefore, at the 8 starting initial stages of motor, motor speed is progressively to improve, and is beneficial to the smooth start of series excited machine.Is (starting of this place's motor first regulating frequency or pulsewidth?) because motor is an inductive load, form by resistance and inductance, during pulse high level, power switch pipe IGBT conducting, Vce is zero, and motor 8 is switched on and rotated, simultaneously the motor inductive energy storage, during pulses low, IGBT turn-offs, and the motor energy storage inductor is to continued flow tube 6 discharges, and the sense of current is constant, motor remains in operation, continued flow tube 6 makes the inductive energy storage of motor play palingenesis, and the IGBT power loss obviously reduces, according to the requirement of soya-bean milk technology in different phase, the pulse and/or the pulsewidth of CPU I/O output different frequency, realize stepless control motor speed, single-chip microcomputer integrated circuit CPU earlier is output as zero to the pulse signal of light lotus root device 4 I/O when disable motor, closed relay 7 again, realize the shutoff of contact zero current.
The control procedure of heating component: begin heating, singlechip CPU output control signal, switch relay 9 energisings, the closing of contact, realize the open-minded of zero current, the single-chip processor i/o output pulse signal, to the input of light lotus root device 4, power switch pipe 5 gets pulse control signal, heating component 10 power supplies, the duty ratio difference of control wave, electric heating tube gets the electrical power of step-less adjustment, according to the requirement of soya-bean milk program, control required power, when closing heating, close the signal of monolithic integrated circuit to light lotus root device 4 earlier, closed relay switch 9 is realized the shutoff of contact zero current again.
Claims (10)
1. alignment circuit that exchanges series excited machine frequency conversion variable pulse width, comprise rectification circuit, the strong and weak electricity isolating device, power switch pipe, continued flow tube and CPU, it is characterized in that: described rectification circuit provides DC control supply to described power switch pipe, described strong and weak electricity isolating device connects the control end of power switch pipe, the variable frequency that described CPU produces or the pulse control signal of variable impulse width are input in the described strong and weak electricity isolating device, control the work of described strong and weak electricity isolating device, thereby trigger the conducting of described power switch pipe, described power switch pipe inserts in the power supply circuits of motor, the pulse control signal that makes described CPU produce is realized the speed governing of frequency conversion or variable pulse width to motor, described continued flow tube and motor are connected to form continuous current circuit, make inductive energy storage discharge in the motor keep motor and remain in operation.
2. a kind of alignment circuit that exchanges series excited machine frequency conversion variable pulse width as claimed in claim 1, it is characterized in that: described strong and weak electricity isolating device adopts optocoupler, described optocoupler is connected the control end of described power switch pipe, and the pulse control signal output of described CPU is connected with the control end of described optocoupler.
3. a kind of alignment circuit that exchanges series excited machine frequency conversion variable pulse width as claimed in claim 1, it is characterized in that: an end that is connected in described power switch pipe behind described continued flow tube and the motor parallel, have no progeny in described power switch pipe pass, described continued flow tube and motor constitute continuous current circuit.
4. a kind of alignment circuit that exchanges series excited machine frequency conversion variable pulse width as claimed in claim 3 is characterized in that: described continued flow tube is a fast recovery diode.
5. a kind of alignment circuit that exchanges series excited machine frequency conversion variable pulse width as claimed in claim 1 is characterized in that: be provided with filter circuit after described rectification circuit.
6. a kind of alignment circuit that exchanges series excited machine frequency conversion variable pulse width as claimed in claim 5, it is characterized in that: be provided with voltage stabilizing circuit after described filter circuit, described voltage stabilizing circuit becomes the control power supply of stable DC as described power switch pipe IGBT with pulsating direct current.
7. a kind of alignment circuit that exchanges series excited machine frequency conversion variable pulse width as claimed in claim 1, it is characterized in that: also include switch relay, described switch relay inserts in the motor circuit, the connection of described switch relay is early than the conducting of described power switch pipe, and the disconnection of described switch relay is later than the disconnection of described power switch pipe.
8. a kind of alignment circuit that exchanges series excited machine frequency conversion variable pulse width as claimed in claim 1 is characterized in that: described power switch pipe adopts power switch pipe IGBT, and described CPU adopts single-chip microcomputer.
9. soy bean milk making machine, comprise housing and main frame, described main frame includes motor, by described motor-driven cutter head with control the control circuit of described machine operation, it is characterized in that: described motor is for exchanging series excited machine, be provided with alignment circuit in the described control circuit, described alignment circuit is the described alignment circuit of above-mentioned arbitrary claim.
10. a kind of soy bean milk making machine as claimed in claim 9, it is characterized in that: described main frame also is provided with heating component, described heating component is connected with described alignment circuit, and described alignment circuit is realized the stepless power adjusting of variable ratio frequency changer or variable impulse width to described heating component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202382965U CN201528313U (en) | 2009-11-02 | 2009-11-02 | Speed regulating circuit with variable frequency and variable pulse width of AC series motor as well as soy-bean milk machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202382965U CN201528313U (en) | 2009-11-02 | 2009-11-02 | Speed regulating circuit with variable frequency and variable pulse width of AC series motor as well as soy-bean milk machine |
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| Publication Number | Publication Date |
|---|---|
| CN201528313U true CN201528313U (en) | 2010-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202382965U Expired - Fee Related CN201528313U (en) | 2009-11-02 | 2009-11-02 | Speed regulating circuit with variable frequency and variable pulse width of AC series motor as well as soy-bean milk machine |
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| CN (1) | CN201528313U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518711A (en) * | 2013-09-30 | 2015-04-15 | 贵州航天电子科技有限公司 | Coding technology based stepless speed regulating circuit of motor |
| WO2016044998A1 (en) * | 2014-09-23 | 2016-03-31 | 广东威灵电机制造有限公司 | Series-excited motor control system, series-excited motor and washing machine |
| WO2016078171A1 (en) * | 2014-11-19 | 2016-05-26 | 广东威灵电机制造有限公司 | Series excitation electrical motor control system, series excitation electrical motor and washing machine |
| CN106152510A (en) * | 2015-04-22 | 2016-11-23 | 丁樟富 | Alternating current and the dual-purpose air-source water heater of photovoltaic DC |
-
2009
- 2009-11-02 CN CN2009202382965U patent/CN201528313U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518711A (en) * | 2013-09-30 | 2015-04-15 | 贵州航天电子科技有限公司 | Coding technology based stepless speed regulating circuit of motor |
| WO2016044998A1 (en) * | 2014-09-23 | 2016-03-31 | 广东威灵电机制造有限公司 | Series-excited motor control system, series-excited motor and washing machine |
| WO2016078171A1 (en) * | 2014-11-19 | 2016-05-26 | 广东威灵电机制造有限公司 | Series excitation electrical motor control system, series excitation electrical motor and washing machine |
| CN106152510A (en) * | 2015-04-22 | 2016-11-23 | 丁樟富 | Alternating current and the dual-purpose air-source water heater of photovoltaic DC |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100714 Termination date: 20161102 |