CN106602946A - Steady speed control circuit, steady speed control method for direct current motor and lawn mower - Google Patents
Steady speed control circuit, steady speed control method for direct current motor and lawn mower Download PDFInfo
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- CN106602946A CN106602946A CN201611251620.8A CN201611251620A CN106602946A CN 106602946 A CN106602946 A CN 106602946A CN 201611251620 A CN201611251620 A CN 201611251620A CN 106602946 A CN106602946 A CN 106602946A
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- motor
- control module
- armature
- motor speed
- single chip
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Classifications
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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
- H02P7/285—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 controlling armature supply only
- H02P7/29—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 controlling armature supply only using pulse modulation
- H02P7/2913—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 controlling armature supply only using pulse modulation whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
-
- 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
- H02P7/285—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 controlling armature supply only
- H02P7/2855—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 controlling armature supply only whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The invention discloses a steady speed control circuit, steady speed control method for direct current motor and lawn mower. The steady speed control circuit for the direct current motor comprises a motor rotation speed detecting module, a motor steady speed control module, and a single chip microcomputer control module. The motor rotation speed detecting module detects the voltage signals at two ends of the motor armature in real time and the current signals across the motor armature and inputs the signals into the single chip microcomputer control module. When the single chip microcomputer control module receives the voltage signals and the current signals, it obtains the electromotive force consumption of the motor rotation speed and the rotation speed, and compares them with the electromotive force consumption and rotation speed preset in the single chip microcomputer control module. Based on the comparison result, the regulated voltage signals at two ends of the motor armature are outputted; the motor steady speed control module obtains the regulated voltage signals at two ends of the motor armature so as to regulate the motor speed. The steady speed control circuit proposed in the invention reduces the overall energy consumption of the circuit and increases the battery's effective working efficiency.
Description
Technical field
The present invention relates to electric machines control technology, more particularly to DC dynamo steady speed controlling circuit, speed stabilizing control method
And hay mover.
Background technology
Motor is divided into alternating current generator and direct current generator in modern industry production, and direct current generator can be in interior tune in a big way
Speed, therefore direct current generator application is still extensive.
Existing mower motor mostly is direct current generator, and direct current generator produces rotation by the interaction in two magnetic field.
To make motor speed be stable at setting value, conventional control circuit is that motor internal is equipped with energy induced field suddenly to existing hay mover
That sensor, the Hall element electric current flow through in Hall element is closed with the proportional torque of motor speed deviation as speed
Circuit controls are closed, while velocity measuring control device is also served as, but the circuit with Hall element can cause the extra of electricity
Loss, reduces effective operating efficiency of instrument.
Therefore prior art could be improved.
The content of the invention
The main object of the present invention is offer motor fixed-speed control circuit, it is intended to solve steady using the motor of Hall element
Fast control circuit kwh loss is high, battery effectively ineffective problem.
The invention provides a kind of DC dynamo steady speed controlling circuit, including：Motor speed detection module, motor speed stabilizing control
Molding block, single chip control module；
Described motor speed detection module, motor speed stabilizing control module are connected respectively with single chip control module；
The motor speed detection module includes armature of direct current motor both end voltage detector unit, sample resistance unit, electricity
Stream detector unit, constantly detects the voltage signal at armature two ends, flows through the current signal of armature, and by the voltage
Signal, current signal are input to single chip control module；
The single chip control module receives the voltage signal, the current signal of motor speed detection module input, and
Jing single chip control module control programs draw DC motor speed electromotive force consumption and rotating speed, and by the electromotive force consumption and
Rotating speed is compared with the default electromotive force consumption of single chip control module and rotating speed, and according to comparative result armature of direct current motor is exported
Both end voltage adjustment signal；
The motor speed stabilizing control module obtains armature of direct current motor two ends adjustment signal regulation and control armature two ends
Voltage, and then regulate and control motor speed.
Preferably, armature of direct current motor both end voltage detector unit, the current detecting in the motor speed detection module
Unit is connected respectively by two AD conversion mouths with single chip control module.
Preferably, the motor speed stabilizing control module includes regulating and controlling voltage signal output unit, on-off circuit unit；It is described
On-off circuit unit is series at electric motor loop；The regulating and controlling voltage signal output unit exports adjustment signal, driving switch circuit
The voltage at unit regulating armature two ends.
Preferably, the regulating and controlling voltage signal output unit is PWM output units, the PWM output units and single-chip microcomputer
Control module, on-off circuit unit are connected, and export PWM square wave adjustment signals.
Preferably, the on-off circuit unit is N-MOS pipes, and N-MOS pipes receive the PWM square waves of PWM output units output
Adjustment signal, and according to PWM square waves adjustment signal driving switch connector regulating and controlling the voltage at armature two ends.
Present invention also offers a kind of by detecting that direct current generator both end voltage realizes the method that motor speed stabilizing is adjusted, bag
Include：
Single chip control module constantly receives the armature two ends of motor speed detection module input by AD conversion mouth
Voltage signal, the current signal for flowing through armature；
Single chip control module receives the voltage signal, the current signal of motor speed detection module input, and Jing is mono-
Piece machine control module control program draws DC motor speed electromotive force consumption and rotating speed, and by the electromotive force consumption and rotating speed
It is compared with the default electromotive force consumption of single chip control module and rotating speed, armature of direct current motor two ends is exported according to comparative result
Regulating and controlling voltage signal；
Single chip control module to motor speed stabilizing control module exports the armature of direct current motor both end voltage adjustment signal,
And the on-off circuit unit in motor speed stabilizing control module, regulate and control armature both end voltage, and then regulate and control motor speed
Tend towards stability.
Preferably, the input of motor speed detection module is constantly received by AD conversion mouth in the single chip control module
Before armature both end voltage signal, the current signal for flowing through armature, also include：Revolution counter detects motor speed, and
The magnitude of voltage at the corresponding armature two ends of record rotating speed, according to direct current generator characteristic equation motor speed electromotive force consumption is obtained
Amount；The motor speed electromotive force consumption and rotating speed are defaulted in single chip control module for reference value.
Preferably, motor speed is detected in the revolution counter, and records the magnitude of voltage at the corresponding armature two ends of rotating speed,
Motor speed electromotive force consumption is obtained according to direct current generator characteristic equation；It is ginseng by the motor speed electromotive force consumption and rotating speed
Examine before value defaulted in single chip control module, also include：According to Ohm's law, detection direct current generator is in the shape that shuts down
Direct current generator zero load internal resistance under state.
Present invention also offers a kind of hay mover, the DC dynamo steady speed controlling circuit of hay mover is above-mentioned direct current generator
Fixed-speed control circuit.
Preferably, the power supply is the one kind in lithium ion battery module, Ni-MH battery module and lead accumulator.
Beneficial effect of the present invention：The motor speed-stabilizing circuit of the present invention, eliminates conventional survey in motor speed detection module
Fast element Hall element, can carry out corresponding rotation speed change regulation and control according to the size of load resistance, reduce circuit complicated
Degree, reduces circuit total energy consumption, improves the effective operating efficiency of battery, extends the service life of battery；Simultaneously of the invention
The direct current generator of the compatible all models of speed-stabilizing circuit, manufacture craft is simple, convenient, fast, cost performance is high.
Description of the drawings
DC dynamo steady speed controlling circuit module schematic diagram in Fig. 1 one embodiment of the invention；
DC dynamo steady speed controlling circuit integral module schematic diagram in Fig. 2 one embodiment of the invention；
The method stream that motor speed stabilizing is adjusted is realized in Fig. 3 one embodiment of the invention by detecting direct current generator both end voltage
Journey；
Whole streams that motor speed stabilizing is adjusted are realized in Fig. 4 one embodiment of the invention by detecting direct current generator both end voltage
Journey；
The DC dynamo steady speed controlling circuit diagram of Hall element is omitted in Fig. 5 one embodiment of the invention；
The DC dynamo steady speed controlling circuit module schematic diagram of hay mover in Fig. 6 one embodiment of the invention.
The realization of the object of the invention, functional characteristics and advantage will be described further referring to the drawings in conjunction with the embodiments.
Specific embodiment
It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
Reference Fig. 1, the DC dynamo steady speed controlling circuit that one embodiment of the invention is provided, including：Single chip control module
20th, motor speed detection module 21, motor speed stabilizing control module 22；
Described motor speed detection module 21, motor speed stabilizing control module 22 respectively with the phase of single chip control module 20
Even；
The motor speed detection module 21 includes armature of direct current motor both end voltage detector unit 2, sample resistance unit
11st, current detecting unit 9, constantly detect the voltage signal at armature two ends, flow through the current signal of armature, and by institute
State voltage signal, current signal and be input to single chip control module 20；
The single chip control module 20 receives the voltage signal of the input of motor speed detection module 21, electric current letter
Number, and the control program of Jing single chip control modules 20 draws DC motor speed electromotive force consumption Ea and rotating speed n, and will be described
Electromotive force consumption Ea and rotating speed n preset electromotive force consumption Ea` with single chip control module 20 and rotating speed n` is compared, according to than
Relatively result exports armature of direct current motor both end voltage adjustment signal；
The motor speed stabilizing control module 22 obtains armature of direct current motor two ends adjustment signal regulation and control armature two
The voltage at end, and then regulate and control motor speed.
Eliminate the highly energy-consuming commonly used in direct current generator in motor speed detection module 21 to test the speed part Hall element, and
By the magnitude of voltage at direct detection armature of direct current motor two ends, then motor is measured indirectly according to direct current generator characteristic equation and turned
Speed.The extra kwh loss for causing that tests the speed using Hall element is saved, effective operating efficiency of motor power is improve.
The embodiment of the present invention according to DC motor rotation speed characteristic, its rotating speed electromotive force consumption formula：Ea=CeN Φ, its
In, Φ is magnetic flux, CeDirect current generator constant, n is motor speed, EaElectromotive force is rotated for dc motor under certain rotating speed
Consumption.With reference to direct-current motor armature both end voltage equation：U=Ea+RaIa, n=E can be obtaineda/CeΦ=U/CeΦ-RaIa/CeΦ,
I.e. DC motor rotation speed characteristic curve is that a slope is Ra/CeThe straight line of Φ, wherein, U is armature of direct current motor both end voltage,
RaEmpty load of motor internal resistance, IaTo flow through the electric current of armature of direct current motor.So armature of direct current motor both end voltage has right with its rotating speed
The interrelational form answered, can pass through the magnitude of voltage at direct detection armature of direct current motor two ends, and motor speed is measured indirectly.
The embodiment of the present invention saves the direct current generator speed measuring module of Hall element according to above-mentioned theory layout, accordingly changes
Become the data processing mode in single chip control module so that the embodiment of the present invention is saving the premise of highly energy-consuming Hall element
Under, still realize the speed stabilizing to dc motor and control, effective operating efficiency of DC motor power is greatly improved, save
Power saving energy resource.
Single chip control module 20 described in the embodiment of the present invention is the processing module of system control command, is the control of system
Core processed.Responsible armature of direct current motor both end voltage U for receiving the input of motor speed detection module 21 of single chip control module 20,
Flow through armature of direct current motor electric current Ia, and show that motor speed electromotive force consumes according to the data processor of single chip control module 20
Amount EaAnd rotating speed n, 20 couples of default E of single chip control modulea` and rotating speed n` and detection EaAnd rotating speed n is compared, and according to
Comparative result exports the adjustment signal of armature of direct current motor both end voltage U to motor speed stabilizing control module 22.
Further, the armature of direct current motor both end voltage in motor speed detection module described in the embodiment of the present invention 21
Detector unit 2, current detecting unit 9 are connected respectively by two AD conversion mouths with single chip control module.
Single chip control module 20 can only be processed data signal, the result or digital quantity of process, but in this reality
Apply during a circuit automatically controls, variable to be dealt with is voltage signal, current signal, and voltage signal, current signal want elder generation Jing
Being converted into digital quantity can be processed by single chip control module.So single chip control module 20 passes through two AD
(Analog to Digital abbreviation AD) conversion mouth is electric with the armature of direct current motor two ends in motor speed detection module 21 respectively
Pressure detector unit 2, current detecting unit 9 are connected, and voltage signal, current signal are converted into into data signal, and according to two AD
Electric current, voltage signal after conversion mouth conversion carries out information processing, and the information result after process is exported.
In the embodiment of the present invention in DC dynamo steady speed controlling circuit integral module, the motor speed stabilizing control module 22 is wrapped
Include regulating and controlling voltage signal output unit, on-off circuit unit；The on-off circuit unit is series at electric motor loop；The voltage is adjusted
Control signal output unit output adjustment signal, the voltage at driving switch circuit unit regulation and control armature two ends.
With reference to Fig. 2, DC dynamo steady speed controlling circuit in the embodiment of the present invention, the regulating and controlling voltage signal output unit is
PWM output units 10, the PWM output units 10 are connected with single chip control module 20, on-off circuit unit, export PWM side
Ripple adjustment signal.
The on-off circuit unit is N-MOS pipes 1, and N-MOS pipes 1 receive the PWM square waves regulation and control of the output of PWM output units 10
Signal, and according to PWM square waves adjustment signal driving switch connector regulating and controlling the voltage at armature two ends.
PWM output units 10 export PWM square waves, and with its dutycycle required speed is corresponded to.PWM square wave pulse widths are modulated
(Pulse Width Modulator are referred to as：PWM it is) a kind of conventional mode of speed regulation, i.e., by the connection of change electric moter voltage
With the speed of the time control motor for disconnecting.In PWM governing systems, when electrical power, motor speed increases, motor power-off
When, its speed reduces, therefore, change the time of switching electricity according to certain rule, you can the rotating speed of motor is reached and is kept
One stability range.
It is protection motor electricity in the embodiment of the present invention due to very big to the interference of motor power during direct current generator normal work
Source normal work, while there is control power supply circuits function from single chip control module 20.So single chip control module 20
The other end is connected with power control module 25, controls power supply working condition.
Power control module 25 includes power supply detecting signal unit 5, supply voltage detector unit 6, temperature detection list
Unit 7, series voltage stabilizing unit 8, battery electric quantity the indicator unit 9, (Negative of negative tempperature coefficient thermistor unit 10
Temperature CoeffiCient abbreviation NTC).The one end of power control module 25 is connected with power supply 23, the other end and list
Piece machine control module 20 is connected.Power control module 25 is used to control the working condition of power supply 23, to protect power supply
23 service life.
With reference to Fig. 3, the embodiment of the present invention is additionally provided by detecting that direct current generator both end voltage realizes that motor speed stabilizing is adjusted
Method, including：
S1：Single chip control module 20 constantly receives the motor electricity of the input of motor speed detection module 21 by AD conversion mouth
Pivot both end voltage signal, the current signal for flowing through armature.
S2：Single chip control module 20 receives the voltage signal, the current signal of the input of motor speed detection module 21,
And the data processor of Jing single chip control modules 20 draws DC motor speed electromotive force consumption Ea and rotating speed n, and by institute
State that electromotive force consumption and rotating speed preset electromotive force consumption Ea` with single chip control module 20 and rotating speed n` is compared, according to than
Relatively result exports armature of direct current motor both end voltage adjustment signal.
S3：Single chip control module 20 exports the armature of direct current motor both end voltage and adjusts to motor speed stabilizing control module 22
On-off circuit unit in control signal, and motor speed stabilizing control module 22, regulates and controls armature both end voltage, and then regulates and controls
Motor speed tends towards stability.
It is provided in an embodiment of the present invention by detecting that direct current generator both end voltage realizes what motor speed stabilizing was adjusted with reference to Fig. 4
Method, in the single chip control module 20 armature of motor speed detection module input is constantly received by AD conversion mouth
Before both end voltage signal, the current signal for flowing through armature, also include：S20 revolution counters detect motor speed, and record turns
The magnitude of voltage at the corresponding armature two ends of speed, according to direct current generator characteristic equation motor speed electromotive force consumption E is obtaineda` and
Rotating speed n`；By motor speed electromotive force consumption Ea` and rotating speed n` are defaulted in single chip control module for reference value.
Motor speed is detected in the revolution counter, and records the magnitude of voltage at the corresponding armature two ends of rotating speed, according to straight
Stream motor characteristic equation obtains motor speed electromotive force consumption；It is that reference value is pre- by the motor speed electromotive force consumption and rotating speed
Before in single chip control module, also include：, according to Ohm's law, detection direct current generator is in the state that shuts down for S10
Under direct current generator zero load internal resistance.
The method of above-mentioned detection direct current generator zero load internal resistance is:The dc source that will be processed through current limliting, is added in stopping fortune
Turn armature two ends, the voltage at measurement motor armature two ends, except in cut-off current both direct current generator zero load internal resistance.It is above-mentioned
The method of detection direct current generator zero load internal resistance also can be replaced and the empty load of motor internal resistance for shutting down directly measured using universal meter.
To sum up, it is provided in an embodiment of the present invention by detecting that direct current generator both end voltage realizes the side that motor speed stabilizing is adjusted
Method, it is not necessary to using the Hall element detecting element of highly energy-consuming, but motor speed inspection is received by single chip control module 20
The voltage signal, the current signal of the input of module 21 are surveyed, and the data processor of Jing single chip control modules 20 draws directly
Stream motor speed electromotive force consumption EaAnd rotating speed n, and the electromotive force consumption and rotating speed are preset with single chip control module 20
Electromotive force consumption Ea` and rotating speed n` are compared, and according to comparative result armature of direct current motor both end voltage adjustment signal is exported, and
Motor speed stabilizing control module 22 regulates and controls armature of direct current motor both end voltage, and then regulates and controls DC motor speed.
With reference to Fig. 5, Hall element is eliminated in the embodiment of the present invention in DC motor speed test module, and directly led to
The corresponding relation of direct current generator both end voltage value and tachometer value is crossed, motor speed is detected.Save the extra consumption of Hall element
Can, while simplifying circuit connection complexity.
In existing DC dynamo steady speed controlling circuit, Hall element of the inside equipped with energy induced field, Hall element
In the Hall element electric current that flows through with the proportional torque of motor speed deviation, as speed closed loop systems, while also making
For velocity measuring control device, but Hall element power consumption height causes the excess loss of electric quantity of power supply, reduces the effective of battery
Operating efficiency, and each interface connection of Hall element is complicated, and circuit is numerous and diverse with line.
With reference to Fig. 6, the embodiment of the present invention additionally provides a kind of hay mover, and the DC dynamo steady speed controlling circuit of hay mover is
Above-mentioned DC dynamo steady speed controlling circuit.The extra kwh loss for causing that tests the speed using Hall element is saved, is improve
Effective operating efficiency of electrohydraulic mower electromechanical source.
The power supply of hay mover provided in an embodiment of the present invention is lithium ion battery module.For protection power supply lithium-ion electric
The service life of pond group, there is power supply circuits control function in single chip control module 20, be connected with single chip control module 20
Power control module 25 includes power supply detecting signal unit 5, supply voltage detector unit 6, temperature detecting unit 7, series connection
Voltage regulation unit 8, battery electric quantity indicator lamp 9, NTC 10.Power control module 25 is used for the work of control power supply Li-ion batteries piles
State, to protect the service life of Li-ion batteries piles.
The power supply of hay mover provided in an embodiment of the present invention can be replaced Ni-MH battery module, lead accumulator etc. can be filled
The battery modules of electricity.
Hay mover in the embodiment of the present invention carries fixed-speed control circuit, can be carried out accordingly according to the size of load resistance
Rotation speed change, reduce the loss of unnecessary battery electric quantity, increased the use time of powered mower, improve operation
Efficiency, even more improves the service life of battery, meets the demand of environmental protection.Hay mover speed stabilizing control electricity in the embodiment of the present invention
Road eliminates conventional detecting element Hall element in motor speed detection module, and directly by direct current generator two ends electricity
The corresponding relation of pressure value and tachometer value, detection, controlled motor rotating speed.Hay mover circuit complexity is reduced, circuit is reduced total
Energy consumption.
The preferred embodiments of the present invention are the foregoing is only, the scope of the claims of the present invention, every utilization is not thereby limited
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of DC dynamo steady speed controlling circuit, it is characterised in that include：Motor speed detection module, the control of motor speed stabilizing
Module, single chip control module；
Described motor speed detection module, motor speed stabilizing control module are connected respectively with single chip control module；
The motor speed detection module includes armature of direct current motor both end voltage detector unit, sample resistance unit, electric current inspection
Unit is surveyed, the voltage signal at armature two ends is constantly detected, is flowed through the current signal of armature, and the voltage is believed
Number, current signal be input to single chip control module；
The single chip control module receives the voltage signal, the current signal of motor speed detection module input, and Jing is mono-
Piece machine control module control program draws DC motor speed electromotive force consumption and rotating speed, and by the electromotive force consumption and rotating speed
It is compared with the default electromotive force consumption of single chip control module and rotating speed, armature of direct current motor two ends is exported according to comparative result
Regulating and controlling voltage signal；
The motor speed stabilizing control module obtains the electricity at armature of direct current motor two ends adjustment signal regulation and control armature two ends
Pressure, and then regulate and control motor speed.
2. DC motor control circuit according to claim 1, it is characterised in that in the motor speed detection module
Armature of direct current motor both end voltage detector unit, current detecting unit by two AD conversion mouths respectively with single chip control module
It is connected.
3. DC motor control circuit according to claim 1, it is characterised in that the motor speed stabilizing control module includes
Regulating and controlling voltage signal output unit, on-off circuit unit；The on-off circuit unit is series at electric motor loop；The regulating and controlling voltage
Signal output unit exports adjustment signal, the voltage at driving switch circuit unit regulation and control armature two ends.
4. DC motor control circuit according to claim 3, it is characterised in that the regulating and controlling voltage signal output unit
For PWM output units, the PWM output units are connected with single chip control module, on-off circuit unit, and output PWM square waves are adjusted
Control signal.
5. DC motor control circuit according to claim 4, it is characterised in that the on-off circuit unit is N-MOS
Pipe, N-MOS pipes receive the PWM square wave adjustment signals of PWM output units output, and according to PWM square wave adjustment signal driving switch
Connector is regulating and controlling the voltage at armature two ends.
6. it is a kind of by detecting that direct current generator both end voltage realizes the method that motor speed stabilizing is adjusted, it is characterised in that to include：
Single chip control module constantly receives the armature both end voltage of motor speed detection module input by AD conversion mouth
Signal, the current signal for flowing through armature；
Single chip control module receives the voltage signal, the current signal of motor speed detection module input, and Jing single-chip microcomputers
Control module control program draws DC motor speed electromotive force consumption and rotating speed, and by the electromotive force consumption and rotating speed and list
The default electromotive force consumption of piece machine control module and rotating speed are compared, and according to comparative result armature of direct current motor both end voltage is exported
Adjustment signal；
Single chip control module to motor speed stabilizing control module exports the armature of direct current motor both end voltage adjustment signal, and drives
On-off circuit unit in dynamic motor speed stabilizing control module, regulates and controls armature both end voltage, and then regulates and controls motor speed to tend to
It is stable.
7. according to claim 6 by detecting that direct current generator both end voltage realizes the method that motor speed stabilizing is adjusted, it is special
Levy and be, the armature of motor speed detection module input is constantly received by AD conversion mouth in the single chip control module
Before both end voltage signal, the current signal for flowing through armature, also include：Revolution counter detects motor speed, and records rotating speed
The magnitude of voltage at corresponding armature two ends, according to direct current generator characteristic equation motor speed electromotive force consumption is obtained；Will be described
Motor speed electromotive force consumption and rotating speed are defaulted in single chip control module for reference value.
8. according to claim 6 by detecting that direct current generator both end voltage realizes the method that motor speed stabilizing is adjusted, it is special
Levy and be, in the revolution counter motor speed is detected, and record the magnitude of voltage at the corresponding armature two ends of rotating speed, according to direct current
Motor characteristic equation obtains motor speed electromotive force consumption；The motor speed electromotive force consumption and rotating speed are preset for reference value
Before in the single chip control module, also include：According to Ohm's law, detection direct current generator is straight under state in shutting down
Stream empty load of motor internal resistance.
9. a kind of hay mover, it is characterised in that the DC dynamo steady speed controlling circuit of hay mover is any one of claim 1-5
Described DC dynamo steady speed controlling circuit.
10. hay mover as claimed in claim 9, it is characterised in that the power supply is lithium ion battery module, ni-mh electricity
One kind in pond module and lead accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251620.8A CN106602946A (en) | 2016-12-30 | 2016-12-30 | Steady speed control circuit, steady speed control method for direct current motor and lawn mower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251620.8A CN106602946A (en) | 2016-12-30 | 2016-12-30 | Steady speed control circuit, steady speed control method for direct current motor and lawn mower |
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| CN106602946A true CN106602946A (en) | 2017-04-26 |
Family
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|---|---|---|---|
| CN201611251620.8A Pending CN106602946A (en) | 2016-12-30 | 2016-12-30 | Steady speed control circuit, steady speed control method for direct current motor and lawn mower |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1224272A (en) * | 1998-12-21 | 1999-07-28 | 成都希望电子研究所 | Quasi-superconductor speed stabilizing system |
| CN101447757A (en) * | 2008-12-12 | 2009-06-03 | 苏州星恒电源有限公司 | Method for controlling battery-powered mower |
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| WO2014121423A1 (en) * | 2013-02-06 | 2014-08-14 | 常州合力电器有限公司 | Double-pack lithium electric lawn mower |
| CN206517326U (en) * | 2016-12-30 | 2017-09-22 | 欣旺达电子股份有限公司 | DC dynamo steady speed controlling circuit and hay mover |
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| CN101478279A (en) * | 2008-10-21 | 2009-07-08 | 北京华凯汇信息科技有限公司 | DC motor driver and driving method |
| CN101447757A (en) * | 2008-12-12 | 2009-06-03 | 苏州星恒电源有限公司 | Method for controlling battery-powered mower |
| CN102204451A (en) * | 2009-11-13 | 2011-10-05 | 苏州宝时得电动工具有限公司 | Cropper |
| CN202424606U (en) * | 2011-12-19 | 2012-09-05 | 华北电力大学 | Direct current motor controller without speed-measurement sensor |
| WO2014121423A1 (en) * | 2013-02-06 | 2014-08-14 | 常州合力电器有限公司 | Double-pack lithium electric lawn mower |
| CN206517326U (en) * | 2016-12-30 | 2017-09-22 | 欣旺达电子股份有限公司 | DC dynamo steady speed controlling circuit and hay mover |
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