CN104242751A - Motor control circuit for laser swinger - Google Patents
Motor control circuit for laser swinger Download PDFInfo
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- CN104242751A CN104242751A CN201410415702.6A CN201410415702A CN104242751A CN 104242751 A CN104242751 A CN 104242751A CN 201410415702 A CN201410415702 A CN 201410415702A CN 104242751 A CN104242751 A CN 104242751A
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- motor
- resistance
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- voltage
- motor speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electric Motors In General (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The invention provides a motor control circuit for a laser swinger. The motor control circuit is connected to the two ends of a motor and comprises a motor speed regulation module and a motor speed stabilization module. The motor speed stabilization module comprises a single-chip microcomputer and a motor speed stabilization chip. The single-chip microcomputer controls the work state of the motor speed stabilization chip. The motor speed stabilization chip is connected to the two ends of the motor. The motor speed regulation module comprises a resistance value adjustable device. The resistance value adjustable device is connected with the motor speed stabilization chip so as to serve as a load of the motor speed stabilization chip. The rotating speed of the motor can be adjusted by changing the resistance value of the resistance value adjustable device. By the adoption of the technical scheme, adjustment time and stabilization time of the rotating speed of the motor are shorter, occupation of resources of the single-chip microcomputer is greatly reduced, and the use efficiency of the single-chip microcomputer is improved.
Description
Technical field
The present invention relates to optoelectronic device control circuit field, particularly relate to a kind of circuit for controlling motor for Geoplane.
Background technology
Geoplane is by a branch of visual semiconductor laser beam, forms a lasing area, as the equipment of the level reference of constructing on a large scale by the mode horizontally rotated.According to the difference of job site, need Geoplane will have the rotation speed governing of many gears, and rotating speed need stable.The speed adjusting technique that present industry generally adopts, the mode mainly regulated by PWM pulse-width modulation and software PID parameter realizes speed governing and speed stabilizing.Carry out the process of speed governing and speed stabilizing by the way, there is following defect:
1., when carrying out the slow-speed of revolution to motor and controlling, because the feedback time cycle of velocity measuring is elongated, cause overshoot to increase, the velocity-stabilization time is longer.
During 2.PWM modulation, the ripple that power supply produces is comparatively large, has an impact to the sampling precision of high-precision level electronic transducer;
3. when PWM, if duty is smaller, its load capacity is poor, comparatively difficulty of regulating the speed when load is excessive, and the time delay sluggishness simultaneously adjusted is excessive;
4.PID computing and PWM speed governing, take the resource of MCU soft and hardware, higher to the system requirements of single-chip microcomputer.
Therefore, need a kind of novel circuit for controlling motor for Geoplane badly, substitute the mode of PWM, to address the aforementioned drawbacks.
Summary of the invention
In order to overcome above-mentioned technological deficiency, the object of the present invention is to provide a kind of circuit for controlling motor for Geoplane.
The invention discloses a kind of circuit for controlling motor for Geoplane, be connected to the two ends of a motor, described circuit for controlling motor comprises electric machine speed regulation module, described circuit for controlling motor also comprises a motor speed stabilizing module, described motor speed stabilizing module comprises a single-chip microcomputer and motor speed stabilizing chip, the operating state of motor speed stabilizing chip described in described Single-chip Controlling, described motor speed stabilizing chip is connected to the two ends of described motor; Described electric machine speed regulation module comprises a resistance adjustable device, and described resistance adjustable device is connected with described motor speed stabilizing chip using the load as described motor speed stabilizing chip, the velocity of rotation of motor described in the resistance adjustable changing described resistance adjustable device.
Preferably, described circuit for controlling motor also comprises a reference voltage circuit, provides a reference voltage; Described motor two ends are connected with load resistance; Described motor speed stabilizing chip comprises: voltage follower, is connected with described reference voltage circuit, exports an output voltage consistent with the voltage of described reference voltage and phase place; Transistor, is connected with described motor, controls the electric current flowing through described motor; Comparator, is connected with described transistor and load resistance, more described load resistance both end voltage and described reference voltage, and controls the angle of flow of described transistor.
Preferably, the pin of described motor speed stabilizing chip comprises: voltage input end, earth terminal, load voltage input, Electric Machine Control input and electrode negative link; Described voltage input end and earth terminal are connected to the two ends of described reference voltage circuit; Described load voltage input, Electric Machine Control input are drawn by the two-way input of described comparator, are connected to the two ends of described load resistance; Described electrode negative link is drawn by the collector electrode of described transistor, is connected to the negative pole of described motor.
Preferably, described circuit for controlling motor also comprises a metal-oxide-semiconductor, controls starting or stoping of described motor; The grid of described metal-oxide-semiconductor is connected with described single-chip microcomputer; The source ground of described metal-oxide-semiconductor; The drain electrode of described metal-oxide-semiconductor is connected with the earth terminal of described motor speed stabilizing chip.
Preferably, described circuit for controlling motor also comprises the first filtering voltage regulation electric capacity and the second filtering voltage regulation electric capacity; Described first filtering voltage regulation electric capacity is connected to described load resistance two ends; One end of described second filtering voltage regulation electric capacity is connected to the negative pole of described motor, other end ground connection.
Preferably, described resistance adjustable device is digital regulation resistance.
Preferably, described digital regulation resistance is connected with described single-chip microcomputer, by the resistance of digital regulation resistance described in described Single-chip Controlling.
Preferably, when described digital regulation resistance resistance is 18K Ω, the rotating speed of described motor is 600rpm; When described digital regulation resistance resistance is 4.7K Ω, the rotating speed of described motor is 300rpm.
Preferably, described circuit for controlling motor also comprises motor speed measuring unit; Described motor speed measuring unit is connected with described single-chip microcomputer and motor, detect described motor rotating speed and by described speed feedback to described single-chip microcomputer.
After have employed technique scheme, compared with prior art, there is following beneficial effect:
1., because motor speed stabilizing chip internal is provided with voltage and current closed-loop drive function, when it regulates, the speed stabilizing time is short, and overshoot is low;
2. during the electric machine speed regulation stage, continuous closed-loop regulates, and the ripple interference produced power supply is less, reduces the interference to artificial circuit part;
3. electric machine speed regulation is simple, and by digital regulation resistance as adjusting the external adjustable resistance of speed stabilizing chip, the resistance changing digital regulation resistance can carry out speed governing very easily;
4. pair mcu resource takies few, only needs the common I/O port utilizing single-chip microcomputer to realize speed governing, does not need to take PWM mouth and corresponding register.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of circuit for controlling motor in one embodiment of the present invention;
Fig. 2 is the block diagram of motor speed stabilizing chip in one embodiment of the present invention;
Fig. 3 is motor speed stabilizing equivalent schematic in one embodiment of the present invention;
Fig. 4 is the pin schematic diagram of motor speed stabilizing chip in one embodiment of the invention.
Embodiment
Advantage of the present invention is set forth further below in conjunction with accompanying drawing and specific embodiment.
Consulting Fig. 1, is the circuit diagram of circuit for controlling motor in one embodiment of the present invention.In the present invention, circuit for controlling motor is connected to the motor two ends of Geoplane, for controlling the rotating speed of motor.Wherein circuit for controlling motor includes motor speed stabilizing module and electric machine speed regulation module, what motor speed stabilizing module adopted is the configuration of single-chip microcomputer and motor speed stabilizing chip, motor speed stabilizing chip is connected to the two ends of motor, utilizes itself character and function, carries out stable and constant speed adjustment to motor speed.Single-chip microcomputer is connected with motor speed stabilizing chip, and controls motor speed stabilizing chip operation whether operating state.And for electric machine speed regulation module, it includes a resistance adjustable device, this resistance adjustable device is connected with motor speed stabilizing chip, using the load as motor speed stabilizing chip, thus, when the resistance of resistance adjustable device changes, also there is corresponding change in the electric current flowing through motor speed stabilizing chip, further, just the size of current flowing through motor is changed, thus reach the function of speed governing, when the rotation speed change of motor, motor speed stabilizing chip just by the speed of motor gradually stable (constant speed), namely reach motor speed adjustment and constant governing speed and steady speed controlled process.
In above-described embodiment, the model of motor speed stabilizing chip can be the common motor speed stabilizing chip for CD floppy drive, tape etc. such as NJM2606, TDA7274, LA5521D, KA2402, D5521D, be understandable that, the chip itself with stable motor speed is all applicable to the motor speed stabilizing chip in the present invention.Due to CD floppy drive, tape in prior art operationally motor be in the state of constant rotation, therefore be usually used in CD floppy drive, function that the motor speed stabilizing chip of tape only needs to have stable motor speed, do not need during use to change the rotating speed of motor, therefore, do not have in prior art resistance adjustable device and motor speed stabilizing chip with the use of mode.
Preferably, resistance adjustable device can be configured to digital regulation resistance, itself has more tap number, thus according to different speed governing demands, selects the digital regulation resistance with appropriate taps number.Digital regulation resistance is as the adjustable equipment of resistance, and the connected mode of itself and motor speed stabilizing chip can adopt the interface modes such as I2C, SPI.Meanwhile, alternatively, digital regulation resistance is connected with single-chip microcomputer, regulating the resistance of digital regulation resistance to be converted at the enterprising line operate of single-chip microcomputer, thus, all can complete on single-chip microcomputer the control of motor speed stabilizing chip and digital regulation resistance, person easy to use completes governing speed and steady speed controlled operation simultaneously.Certainly, as optional, user also directly can adjust its resistance, depending on actual working environment on digital regulation resistance.
In above-described embodiment, resistance adjustable device is not limited to the configuration of digital regulation resistance, user will be understood that, other devices with the adjustable character of resistance as: resistance box, thermistor etc. are all applicable in the present invention, digital regulation resistance is its small volume, easy to adjust, illustrate as preferred embodiment.
Particularly, when the resistance adjustment to digital regulation resistance, if the resistance of digital regulation resistance is 18K Ω, the rotating speed of motor can be 600rpm; If when the resistance of digital regulation resistance is 4.7K Ω, the rotating speed of motor is 300rpm.Be understandable that, in above-described embodiment, the resistance of digital regulation resistance and the relation of motor speed are only reference, and different users can according to the relation between real work situation adjustment resistance and motor speed.With regard to the present embodiment, illustrate in the lump when the relation between resistance and motor speed is described further below speed stabilizing operation principle.
Consulting Fig. 2, is the block diagram of motor speed stabilizing chip in one embodiment of the present invention.Also include a reference voltage circuit in circuit for controlling motor, be connected, provide a reference voltage to it with motor speed stabilizing chip, in this embodiment, reference voltage circuit can be obtain by being directly connected with power supply.Be connected with divider resistance R1 and load resistance R2 at motor two ends, meanwhile, divider resistance R1, load resistance R2 connect with resistance adjustable device R3 (being digital regulation resistance R3 in the present embodiment), and are parallel to the two ends of motor.Particularly, motor speed stabilizing chip comprises a voltage follower, and one input end is connected with reference voltage circuit, and inputs an output voltage consistent with the voltage of reference voltage and phase place; One transistor, its collector electrode is connected with motor, then the electric current flowing through transistor will flow to motor simultaneously, and namely transistor current size directly determines the size of current of motor; One comparator, its output is connected with the source electrode of transistor, two inputs are connected to the two ends of load resistance R2, the input voltage of comparator is made to be the voltage at load resistance R2 two ends, comparator will compare the voltage at load resistance R2 two ends, and this voltage and reference voltage is compared, and determines whether by the result compared the angle of flow changing transistor, after the angle of flow change of transistor, namely change the current value flowing through transistor.
Consult Fig. 3 and Fig. 4, be respectively the pin schematic diagram of motor speed stabilizing equivalent schematic and motor speed stabilizing chip in one embodiment of the present invention.The pin of motor speed stabilizing chip includes voltage input end (3 pin), earth terminal (5 pin), load voltage input (6 pin), Electric Machine Control input (8 pin), electrode negative link (4 pin).Wherein, voltage input end (3 pin) and earth terminal (5 pin) are connected to the two ends of reference voltage circuit, and in diagram, reference voltage circuit is supply voltage.And load voltage input (6 pin), Electric Machine Control input (8 pin) are drawn by the two-way input of comparator, be connected to the two ends of load resistance R2.Electrode negative link (4 pin) is drawn by the collector electrode of transistor, is connected to the negative pole of motor.
In above-described embodiment, motor speed stabilizing chip also includes a metal-oxide-semiconductor Q1, for controlling startup and the stopping of motor.Particularly, as shown in Figure 1, the grid of metal-oxide-semiconductor Q1 is connected with single-chip microcomputer, and by the conducting state of Single-chip Controlling metal-oxide-semiconductor Q1, its source ground, drain electrode is connected with the earth terminal of motor speed stabilizing chip.During control, send the grid of high level to metal-oxide-semiconductor Q1 by single-chip microcomputer, then metal-oxide-semiconductor Q1 conducting, motor speed stabilizing chip starts normal work, and drive motors rotates; And single-chip microcomputer is when sending low level to the grid of metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1 turns off, and motor speed stabilizing chip quits work, drive motors stall.
Simultaneously, preferably or alternatively, circuit for controlling motor also comprises the first filtering voltage regulation electric capacity C1 and the second filtering voltage regulation electric capacity C2, wherein the first filtering voltage regulation electric capacity C1 is connected to the two ends (being divider resistance R1 two ends in diagram) of divider resistance R1 or load resistance R2, one end of second filtering voltage regulation electric capacity C2 is connected to the negative pole of motor, other end ground connection.The setting of two filtering voltage regulation electric capacity, carries out filtering to the voltage at motor two ends further and stablizes, and reduces the stable required time of motor speed stabilizing chip to electric moter voltage.
Preferably or alternatively, in the present invention, circuit for controlling motor also includes a motor speed measuring unit, is connected with single-chip microcomputer and motor, can detect the rotating speed of motor and the result of detection is sent to single-chip microcomputer place.User can observe the change of motor speed intuitively from single-chip microcomputer, if do not reach the rotating speed of needs, then can continue to operate resistance adjustable device, regulate its resistance, finally to complete the object of adjustment motor speed.
After there is the configuration of above preferred embodiment, when user needs to regulate motor speed, first changed by the resistance of single-chip microcomputer to digital regulation resistance R3, because digital regulation resistance R3 is connected in parallel on the two ends of motor speed stabilizing chip, and the voltages keep constant at load resistance R2 two ends, after then the resistance of digital regulation resistance R3 changes, the voltage at digital regulation resistance R3 two ends also will change thereupon, thus the voltage at motor two ends is changed.Particularly, the voltage at load resistance R2 two ends is defined as reference voltage V
ref, the electric current flowing through load resistance R2 is reference current I
ref, then that the input of comparator one input is this reference voltage V
ref, meanwhile, the reference voltage for reference voltage circuit input of comparator other end input, comparator is by comparison reference voltage V
refwith the size of reference voltage, if both sizes are identical, then can not change the angle of flow of transistor, keep existing motor speed; If the change in resistance due to digital regulation resistance R3 causes reference current I
refchange, this resistance sentencing digital regulation resistance R3 becomes greatly example), reference current I
refdiminish, reference voltage V
refalso diminish thereupon, then make reference voltage V
refdifferent from reference voltage.When comparator detects that reference voltage is different from reference voltage, the transistor being connected to comparator output terminal is controlled, change its angle of flow, to increase reference current I
ref, until reference voltage V
refequal with reference voltage.Now because the resistance of digital regulation resistance R3 has become large, then the voltage at R3 two ends becomes large thereupon, thus the voltage controlling motor two ends becomes large, just completes the effect of speed governing, speed stabilizing.Because whole speed stabilizing process is continuous print closed-loop drive, thus greatly less speed regulation process disturbs the ripple of power supply, improves the stability of system.In said process, the set point of reference voltage can be 0.2V, also or between 0.18V-0.22V, concrete set point can refer to Chip scale and determines.
Due to the character of motor speed stabilizing chip itself, the reference voltage of motor speed and motor speed stabilizing chip is proportionate relationship, particularly, and for:
(wherein K is the motor speed of setting and the ratio of voltage in motor speed stabilizing chip)
And because:
I
ref＝V
ref/R
2，
Then can be derived from:
The voltage at known motor two ends is after the resistance value of R1, R2, R3 is fixing, only relevant with constant K.Those skilled in the art only need leading inspection information understand the value of K or obtain through overtesting, and just the resistance of adjustable digital potentiometer R3 obtains the motor speed of needs.Be will be understood that by said process, the process of motor speed stabilizing chip stabilized (steady-state) speed is the process of a closed-loop control, and when it regulates, the speed stabilizing time is short, and overshoot is low, and disturbs less to the ripple that power supply produces.
Under above-mentioned configuration, only as controlling, whether motor speed stabilizing chip works single-chip microcomputer, the resistance size of digital regulation resistance, and need not regulate by modulation (PWM) signal, then the resource of this part is separated and released for other control fields again.
Should be noted that, embodiments of the invention have preferably implementation, and not any type of restriction is done to the present invention, any person skilled in art of being familiar with may utilize the technology contents of above-mentioned announcement change or be modified to equivalent effective embodiment, in every case the content of technical solution of the present invention is not departed from, the any amendment done above embodiment according to technical spirit of the present invention or equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (9)
1. for a circuit for controlling motor for Geoplane, be connected to the two ends of a motor, described circuit for controlling motor comprises electric machine speed regulation module, it is characterized in that:
Described circuit for controlling motor also comprises a motor speed stabilizing module, and described motor speed stabilizing module comprises a single-chip microcomputer and motor speed stabilizing chip, the operating state of motor speed stabilizing chip described in described Single-chip Controlling, and described motor speed stabilizing chip is connected to the two ends of described motor;
Described electric machine speed regulation module comprises a resistance adjustable device, and described resistance adjustable device is connected with described motor speed stabilizing chip using the load as described motor speed stabilizing chip, the velocity of rotation of motor described in the resistance adjustable changing described resistance adjustable device.
2. circuit for controlling motor as claimed in claim 1, is characterized in that:
Described circuit for controlling motor also comprises a reference voltage circuit, provides a reference voltage;
Described motor two ends are connected with load resistance;
Described motor speed stabilizing chip comprises:
Voltage follower, is connected with described reference voltage circuit, exports an output voltage consistent with the voltage of described reference voltage and phase place;
Transistor, is connected with described motor, controls the electric current flowing through described motor;
Comparator, is connected with described transistor and load resistance, more described load resistance both end voltage and described reference voltage, and controls the angle of flow of described transistor.
3. circuit for controlling motor as claimed in claim 2, is characterized in that:
The pin of described motor speed stabilizing chip comprises: voltage input end, earth terminal, load voltage input, Electric Machine Control input and electrode negative link;
Described voltage input end and earth terminal are connected to the two ends of described reference voltage circuit;
Described load voltage input, Electric Machine Control input are drawn by the two-way input of described comparator, are connected to the two ends of described load resistance;
Described electrode negative link is drawn by the collector electrode of described transistor, is connected to the negative pole of described motor.
4. circuit for controlling motor as claimed in claim 3, is characterized in that:
Described circuit for controlling motor also comprises a metal-oxide-semiconductor, controls starting or stoping of described motor;
The grid of described metal-oxide-semiconductor is connected with described single-chip microcomputer;
The source ground of described metal-oxide-semiconductor;
The drain electrode of described metal-oxide-semiconductor is connected with the earth terminal of described motor speed stabilizing chip.
5. circuit for controlling motor as claimed in claim 2, is characterized in that:
Described circuit for controlling motor also comprises the first filtering voltage regulation electric capacity and the second filtering voltage regulation electric capacity;
Described first filtering voltage regulation electric capacity is connected to described load resistance two ends;
One end of described second filtering voltage regulation electric capacity is connected to the negative pole of described motor, other end ground connection.
6. circuit for controlling motor as claimed in claim 1, is characterized in that:
Described resistance adjustable device is digital regulation resistance.
7. circuit for controlling motor as claimed in claim 6, is characterized in that:
Described digital regulation resistance is connected with described single-chip microcomputer, by the resistance of digital regulation resistance described in described Single-chip Controlling.
8. circuit for controlling motor as claimed in claims 6 or 7, is characterized in that:
When described digital regulation resistance resistance is 18K Ω, the rotating speed of described motor is 600rpm;
When described digital regulation resistance resistance is 4.7K Ω, the rotating speed of described motor is 300rpm.
9. circuit for controlling motor as claimed in claim 1, is characterized in that:
Described circuit for controlling motor also comprises motor speed measuring unit;
Described motor speed measuring unit is connected with described single-chip microcomputer and motor, detect described motor rotating speed and by described speed feedback to described single-chip microcomputer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410415702.6A CN104242751A (en) | 2014-08-21 | 2014-08-21 | Motor control circuit for laser swinger |
| PCT/CN2015/086364 WO2016026390A1 (en) | 2014-08-21 | 2015-08-07 | Motor control circuit for level laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410415702.6A CN104242751A (en) | 2014-08-21 | 2014-08-21 | Motor control circuit for laser swinger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104242751A true CN104242751A (en) | 2014-12-24 |
Family
ID=52230263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410415702.6A Pending CN104242751A (en) | 2014-08-21 | 2014-08-21 | Motor control circuit for laser swinger |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104242751A (en) |
| WO (1) | WO2016026390A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016026390A1 (en) * | 2014-08-21 | 2016-02-25 | 常州华达科捷光电仪器有限公司 | Motor control circuit for level laser |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109768744B (en) * | 2019-01-25 | 2023-09-08 | 宁波大学 | DC motor control device and control method |
| CN115531730B (en) * | 2022-10-27 | 2024-05-14 | 南京大麦医疗科技有限公司 | Automatic regulating circuit for wave source output of millimeter wave therapeutic apparatus |
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| US4240015A (en) * | 1977-08-15 | 1980-12-16 | Exxon Research & Engineering Co. | Control system and method for operating a DC motor |
| CN1801362A (en) * | 2005-01-05 | 2006-07-12 | 贺于天 | Method for simultaneously playing picture tape and its dubbing magnetic tape and phonic picture player |
| CN1980041A (en) * | 2005-12-08 | 2007-06-13 | 上海神力科技有限公司 | Fuel all engine air-conveying device fan speed-stabilizing control circuit |
| CN204103812U (en) * | 2014-08-21 | 2015-01-14 | 常州华达科捷光电仪器有限公司 | A kind of circuit for controlling motor for Geoplane |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1661951A1 (en) * | 1986-05-05 | 1991-07-07 | Новополоцкий Политехнический Институт Им.Ленинского Комсомола Белоруссии | Dc electric drive |
| CN101311547A (en) * | 2007-05-24 | 2008-11-26 | 上海福太隆汽车电子科技有限公司 | Control circuit of blower for vehicle air conditioning |
| CN101373944B (en) * | 2008-06-25 | 2011-03-23 | 何伟斌 | Driver for brushless DC motor |
| CN104242751A (en) * | 2014-08-21 | 2014-12-24 | 常州华达科捷光电仪器有限公司 | Motor control circuit for laser swinger |
-
2014
- 2014-08-21 CN CN201410415702.6A patent/CN104242751A/en active Pending
-
2015
- 2015-08-07 WO PCT/CN2015/086364 patent/WO2016026390A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3868554A (en) * | 1973-12-26 | 1975-02-25 | Gen Electric | Current limit system for DC motor control |
| US4240015A (en) * | 1977-08-15 | 1980-12-16 | Exxon Research & Engineering Co. | Control system and method for operating a DC motor |
| CN1801362A (en) * | 2005-01-05 | 2006-07-12 | 贺于天 | Method for simultaneously playing picture tape and its dubbing magnetic tape and phonic picture player |
| CN1980041A (en) * | 2005-12-08 | 2007-06-13 | 上海神力科技有限公司 | Fuel all engine air-conveying device fan speed-stabilizing control circuit |
| CN204103812U (en) * | 2014-08-21 | 2015-01-14 | 常州华达科捷光电仪器有限公司 | A kind of circuit for controlling motor for Geoplane |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016026390A1 (en) * | 2014-08-21 | 2016-02-25 | 常州华达科捷光电仪器有限公司 | Motor control circuit for level laser |
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|---|---|
| WO2016026390A1 (en) | 2016-02-25 |
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