CN110380668A - A kind of device for controlling power tool and electric tool - Google Patents
A kind of device for controlling power tool and electric tool Download PDFInfo
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- CN110380668A CN110380668A CN201910689084.7A CN201910689084A CN110380668A CN 110380668 A CN110380668 A CN 110380668A CN 201910689084 A CN201910689084 A CN 201910689084A CN 110380668 A CN110380668 A CN 110380668A
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- 238000005070 sampling Methods 0.000 claims abstract description 47
- 230000005611 electricity Effects 0.000 claims abstract description 19
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 11
- 229910052744 lithium Inorganic materials 0.000 claims description 11
- 229910052987 metal hydride Inorganic materials 0.000 claims description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 2
- 229910052759 nickel Inorganic materials 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910018487 Ni—Cr Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
- H02H7/0838—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements with H-bridge circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
- H02H7/1227—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters responsive to abnormalities in the output circuit, e.g. short circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
- H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
- H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
-
- 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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
Abstract
A kind of device for controlling power tool, comprising: control module, power module, phase line sampling module, power module, power module are electrically connected with control module, power module respectively；Power module includes several power supply branches, and each power supply branch includes upper bridge arm power switch and lower bridge arm power switch, and the contact that is electrically connected of upper bridge arm power switch and lower bridge arm power switch be the power supply output end of power supply branch；Phase line sampling module is used to sample the electric signal of power supply branch output, obtains feedback signal, electric signal is used to drive the motor of electric tool；Control module is used to judge based on the feedback signal the rotor-position of motor, and according to rotor-position control power module for electricity output；Control module is also used to judge based on the feedback signal whether upper bridge arm power switch is short-circuit, and the open and close of phase line sampling module are controlled according to the judging result of upper bridge arm power switch.The present invention, which has, saves electric energy, protection battery, the technical characterstic for extending power source life.
Description
Technical field
The invention belongs to field of power tools more particularly to a kind of device for controlling power tool and electric tool.
Background technique
The electric tool of battery is used at present, and electric power is provided by lithium battery.Lithium battery is excessively put with minimum electric discharge requirement
Electricity can seriously affect the service life of lithium battery, or even directly result in lithium battery and scrap.Consider for cost limitation and versatility, at present
The lithium battery of most electric tools itself does not have over-discharge protection, therefore demand controller connected to it completes over-discharge
Defencive function.
Current controller is in order to realize sample motor phases line voltage semiotic function and fill for upper bridge arm driving circuit capacitor
Electricity Functional, connected resistance R between phase line and ground.After upper bridge arm power device is extremely short-circuit so that battery plus-negative plate it
Between there are circuit electric discharge, which is cell voltage divided by resistance R, which is generally mA rank.
Therefore, after bridge arm power device is extremely short-circuit on controller, if battery is still inserted on machine, which is returned
Road is always to battery discharge, if disconnecting battery not in time, over-discharge state easily occurs in battery, reduces service life of lithium battery or damage
Lithium battery.
Summary of the invention
Technical purpose of the invention is to provide a kind of device for controlling power tool and electric tool, has and saves electric energy, protection
Power supply, the technical characterstic for extending power source life.
To solve the above problems, the technical solution of the present invention is as follows:
A kind of device for controlling power tool, comprising:
Control module, power module, phase line sampling module, power module, the control module respectively with the power mould
Block, phase line sampling module electrical connection, the power module are electrically connected with the phase line sampling module, the power module point
It is not electrically connected with the control module, the power module；
The power module includes several power supply branches, and each power supply branch includes upper bridge arm power switch and lower bridge
The input terminal of arm power switch, the upper bridge arm power switch is electrically connected with the power module, the upper bridge arm power switch
Output end be electrically connected with the input terminal of the lower bridge arm power switch, the output end of lower bridge arm power switch ground connection, institute
It states bridge arm power switch and is electrically connected with control module control with the control terminal of the lower bridge arm power switch, wherein
The contact that is electrically connected of the upper bridge arm power switch and the lower bridge arm power switch is the power supply output end of the power supply branch；
The phase line sampling module is used to sample the electric signal of the power supply branch output, obtains feedback signal,
The electric signal is used to drive the motor of the electric tool；The control module is used for according to feedback signal judgement
The rotor-position of motor, and according to the rotor-position control the power module for electricity output；The control module is also used
In judging whether the upper bridge arm power switch is short-circuit according to the feedback signal, according to the judgement of the upper bridge arm power switch
As a result the open and close of the phase line sampling module are controlled.
An embodiment according to the present invention, the phase line sampling module include several sampling branches, each sampling branch
Road includes electric-controlled switch, first resistor and second resistance；
One end of the first resistor is electrically connected with the power supply output end of the power module, the first resistor it is another
End is electrically connected with the input terminal of the electric-controlled switch, and the control terminal of the electric-controlled switch and control module control connect, institute
The output end for stating electric-controlled switch is electrically connected with one end of the second resistance, the other end ground connection of the second resistance, wherein institute
State the output end that contact is the feedback signal that is electrically connected of electric-controlled switch and the second resistance.
An embodiment according to the present invention, the phase line sampling module further includes 3rd resistor, and the control module is equipped with electricity
Control power supply；
The control terminal of the electric-controlled switch is electrically connected with described 3rd resistor one end, the other end of the 3rd resistor and institute
Automatically controlled power electric connection is stated, the control module controls the Push And Release of the automatically controlled power supply, to realize opening for the electric-controlled switch
With pass.
An embodiment according to the present invention, the electric-controlled switch are NMOS tube or PMOS tube or CMOS tube or three poles
Pipe.
An embodiment according to the present invention, the upper bridge arm power switch be NMOS tube or PMOS tube or CMOS tube or
IGBT perhaps the pliotron lower bridge arm power switch be NMOS tube or PMOS tube or CMOS tube or IGBT or
Pliotron.
An embodiment according to the present invention, the power module are lithium battery or Ni-Cr battery or nickel-metal hydride battery or lead
Battery.
A kind of electric tool, comprising: the device for controlling power tool as described in above-described embodiment any one.
The present invention due to using the technology described above, makes it have the following advantages that and actively imitate compared with prior art
Fruit:
The present invention is sampled by the electric signal that the phase line sampling module of device for controlling power tool exports power module,
According to the feedback signal of sampling while the power supply control for realizing motor, moreover it is possible to detect upper bridge arm power supply in power supply branch
Whether switch is short-circuit, if short circuit occurs for the upper bridge arm power switch of power module, the power end of the power supply branch and power supply are defeated
The voltage of outlet will be equal, and short circuit occurs front and back electric signal and changed, then the feedback signal of phase line sampling module acquisition
It will change, the variation of control module based on feedback signal, detection show whether the upper bridge arm power switch of power module is short
Road disconnects the circuit of phase line sampling module, if short circuit to prevent power module under short-circuit conditions from reaching through the circuit continuous discharge
It has arrived and has saved electric energy, protection power source, the technical effect for extending power source life.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of device for controlling power tool of the invention；
Fig. 2 is a kind of control process schematic diagram of device for controlling power tool of the invention.
Description of symbols:
1- control module；2- power module；3- phase line sampling module；4- power module.
Specific embodiment
A kind of device for controlling power tool proposed by the present invention and electric tool are made below in conjunction with the drawings and specific embodiments
It is further described.According to following explanation and claims, advantages and features of the invention will be become apparent from.
Embodiment 1
Referring to Fig. 1, the present embodiment provides a kind of device for controlling power tool, comprising:
Control module 1, power module 2, phase line sampling module 3, power module 4, control module 1 respectively with power module 2,
Phase line sampling module 3 is electrically connected, and power module 2 is electrically connected with phase line sampling module 3, power module 4 respectively with control module 1,
Power module 2 is electrically connected；
Power module 2 includes several power supply branches, and each power supply branch includes upper bridge arm power switch and lower bridge arm power supply
Switch, the input terminal of upper bridge arm power switch are electrically connected with power module 4, output end and the lower bridge arm electricity of upper bridge arm power switch
The input terminal of source switch is electrically connected, and the output end ground connection of lower bridge arm power switch, upper bridge arm power switch is opened with lower bridge arm power supply
The control terminal of pass is controlled with control module 1 and is connected, wherein the contact that is electrically connected of upper bridge arm power switch and lower bridge arm power switch
For the power supply output end for branch of powering；
Phase line sampling module 3 is used to sample the electric signal of power supply branch output, obtains feedback signal, electric signal is used
In the motor of driving electric tool；Control module 1 is used to judge based on the feedback signal the rotor-position of motor, and according to rotor position
Set control power module 2 for electricity output；Control module 1 is also used to judge based on the feedback signal whether upper bridge arm power switch is short
Road controls the open and close of phase line sampling module 3 according to the judging result of upper bridge arm power switch.
Now specifically the present embodiment is illustrated:
Specifically, referring to Fig. 1, the present embodiment is illustrated by taking three phase supply as an example, but be not limited only to three phase supply this
Kind electric power thus supplied, the present embodiment are equipped with three power supply branches, provide U phase electric signal, V phase electric signal, W phase electric signal respectively, right
Ying Di, NMOS tube M1, M2, M3 are the upper bridge arm power switch of each branch, and NMOS tube M4, M5, M6 are the lower bridge arm electricity of each branch
Source switch, the Push And Release that 6 control routes control above-mentioned 6 metal-oxide-semiconductors respectively is arranged in control module 1, to control entire power
Module 2 for electricity output.
Specifically, upper bridge arm power switch be NMOS (N-Metal-Oxide-Semiconductor) transistor or
PMOS (positive channel Metal Oxide Semiconductor) transistor or CMOS (Complementary
Metal Oxide Semiconductor) and transistor or IGBT (Insulated Gate Bipolar Transistor, absolutely
Edge grid bipolar junction transistor) perhaps pliotron lower bridge arm power switch be NMOS tube or PMOS tube or CMO pipe or
IGBT or pliotron.Further, the upper bridge arm power switch of the present embodiment is preferably with lower bridge arm power switch
NMOS tube.
More preferably, phase line sampling module 3 includes several sampling branches, and each sampling branch includes electric-controlled switch, first
Resistance and second resistance；One end of first resistor is electrically connected with the output end of electric signal, and the other end of first resistor is opened with automatically controlled
The input terminal of pass is electrically connected, and control terminal and control module 1 control of electric-controlled switch connect, the output end of electric-controlled switch and the second electricity
One end of resistance is electrically connected, the other end ground connection of second resistance, wherein electric-controlled switch and the contact that is electrically connected of second resistance is feedback letters
Number output end.
Specifically, referring to Fig. 1, the present embodiment is illustrated so that three phase supply samples as an example, and the present embodiment is equipped with three and adopts
Sample branch respectively samples U phase electric signal, V phase electric signal, W phase electric signal, and accordingly, resistance R4, R5, R6 are each
The first resistor on road, resistance R14, R15, R16 are the second resistance of each branch, and metal-oxide-semiconductor Q4, Q5, Q6 are electric-controlled switch, BEMF_
U, BEMF_V, BEMF_W are corresponding feedback signal.The electric signal that power module 2 is exported by first resistor and second resistance
It is divided, to meet the operating voltage range of control module 1, generally, feedback signal is less than 5V or 3.3V or 2.5V.
If short circuit occurs for any one in upper bridge arm power switch, voltage can be changed into supply voltage at U/V/W, by the first electricity
Resistance, second resistance partial pressure, feedback signal can change, the parameter value based on the feedback signal of control module 1 and threshold value into
Row multilevel iudge knows whether that short circuit occurs, if short circuit occurs can carry out the cutting of sampling branch by electric-controlled switch, to prevent
The sampled branch continuous discharge of battery supply.
More preferably, phase line sampling module 3 further includes 3rd resistor, and control module 1 is equipped with automatically controlled power supply；The control of electric-controlled switch
End processed is electrically connected with 3rd resistor one end, and the other end of 3rd resistor and automatically controlled power electric connection, control module control automatically controlled electricity
The Push And Release in source, to realize the Push And Release of electric-controlled switch.
Specifically, referring to Fig. 1, the present embodiment is illustrated so that three phase supply samples as an example, the electric-controlled switch of the present embodiment
Q4, Q5, Q6 are controlled by same control terminal, and the voltage that+12V whether can be exported by control module 1 carries out electric-controlled switch
Push And Release, when normal work, using the pressure difference between the+12V and BEMF_U or BEMF_V or BEMF_W of the output of automatically controlled power supply, really
Protecting three MOS can fully open.When controlling the closing of automatically controlled power supply, the left end R20 is 0V over the ground, and Q4/Q5/Q6 is completely closed,
Branch is sampled with cutting.
Specifically, electric-controlled switch is NMOS tube or PMOS tube or CMOS tube or triode.Further, this implementation
The electric-controlled switch of example is preferably NMOS tube.
Specifically, power module 4 can be lithium battery or Ni-Cr battery or nickel-metal hydride battery or lead storage battery.This reality
The power module 4 for applying example is lithium battery.
More preferably, the present embodiment is additionally provided with abnormal indicating module, which can be indicator light or display screen.Specifically
Ground, if short circuit occurs for upper bridge arm power switch, control module 1 controls abnormal indicating module and carries out abnormal instruction.More preferably, it controls
Module 1 is when detecting that short circuit occurs for upper bridge arm power switch, when being equipped with one section of delay meter, in order to the reserved use that allows for a period of time
Family finds the exception, if reaching preset time when delay meter, control module 1 closes phase line sampling module, to improve abnormal people
Propertyization design.
1 control process of control module originally implemented is illustrated now in conjunction with Fig. 2:
Device for controlling power tool initialization, control module 1 control power module 2 and export electric signal；During the work time, phase
Line sampling module 3 acquires electric signal in real time, obtains feedback signal；The bridge arm function on real-time judgment based on the feedback signal of control module 1
Whether rate device (the upper bridge arm power switch of corresponding the present embodiment) is short-circuit, if otherwise operating normally, if control module 1 refers to
Show the exception information, can be by the power supply branch road setting indicator light of each branch, it can also be by the instructions such as display screen exception, together
When start-up study timing, allow user to find the exception with reserved a period of time, if delay timing reaches setting time, pass through pass
The output of automatically controlled power supply is closed, to close electronic switch (electric-controlled switch of corresponding the present embodiment), to cut off the phase line after short circuit
Discharge loop in sampling module, avoiding discharging for a long time damages the energy-storage units such as battery supply.
The present embodiment is adopted by the electric signal that the phase line sampling module of device for controlling power tool exports power module
Sample, according to the feedback signal of sampling while the power supply control for realizing motor, moreover it is possible to detect upper bridge arm in power supply branch
Whether power switch is short-circuit, if short circuit, the power end of the power supply branch and confession occur for the upper bridge arm power switch of power module
The voltage at electricity output end will be equal, and short circuit occurs front and back electric signal and changed, then the feedback letter of phase line sampling module acquisition
It number will also change, the variation of control module based on feedback signal, detection show that the upper bridge arm power switch of power module is
No short circuit disconnects the circuit of phase line sampling module if short circuit, to prevent under short-circuit conditions power module 4 through the circuit type discharge
Electricity has reached and has saved electric energy, protection power source, the technical effect for extending power source life.
Embodiment 2
The present embodiment provides a kind of electric tool based on embodiment 1, which uses any one of embodiment 1 such as to want
The device for controlling power tool asked.
Electric tool of the present embodiment based on device for controlling power tool, can be with the upper arm bridge power supply of real-time detection power module
Whether switch occurs short circuit, if short circuit occurs can cut off the discharge loop of phase line sampling module in time, for electric tool
Power supply etc. is protected, and prevents its long-time from discharging.
Specifically, the electric signal that the present embodiment exports power module by the phase line sampling module of device for controlling power tool
It is sampled, according to the feedback signal of sampling while the power supply control for realizing motor, moreover it is possible to detect in power supply branch
Whether upper bridge arm power switch is short-circuit, if short circuit, the power supply of the power supply branch occur for the upper bridge arm power switch of power module
End will be equal with the voltage of power supply output end, and short circuit occurs front and back electric signal and changed, then phase line sampling module acquires
Feedback signal will also change, the variation of control module based on feedback signal, and detection obtains the upper bridge arm power supply of power module
Switch whether short circuit, disconnect the circuit of phase line sampling module, if short circuit to prevent under short-circuit conditions power module through the circuit
Continuous discharge has reached and has saved electric energy, protection power source, the technical effect for extending power source life.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode.Even if to the present invention, various changes can be made, if these variations belong to the model of the claims in the present invention and its equivalent technologies
Within enclosing, then still fall within the protection scope of the present invention.
Claims (7)
1. a kind of device for controlling power tool characterized by comprising
Control module, power module, phase line sampling module, power module, the control module respectively with the power module, institute
State the electrical connection of phase line sampling module, the power module is electrically connected with the phase line sampling module, the power module respectively with
The control module, power module electrical connection；
The power module includes several power supply branches, and each power supply branch includes upper bridge arm power switch and lower bridge arm electricity
The input terminal of source switch, the upper bridge arm power switch is electrically connected with the power module, the upper bridge arm power switch it is defeated
Outlet is electrically connected with the input terminal of the lower bridge arm power switch, the output end of lower bridge arm power switch ground connection, it is described on
The control terminal of bridge arm power switch and the lower bridge arm power switch is controlled with the control module and is connected, wherein on described
The contact that is electrically connected of bridge arm power switch and the lower bridge arm power switch is the power supply output end of the power supply branch；
The phase line sampling module is used to sample the electric signal of the power supply branch output, obtains feedback signal, described
Electric signal is used to drive the motor of the electric tool；The control module is used to judge the motor according to the feedback signal
Rotor-position, and according to the rotor-position control the power module for electricity output；The control module is also used to root
Judge whether the upper bridge arm power switch is short-circuit according to the feedback signal, according to the judging result of the upper bridge arm power switch
Control the open and close of the phase line sampling module.
2. device for controlling power tool according to claim 1, which is characterized in that the phase line sampling module includes several
Branch is sampled, each sampling branch includes electric-controlled switch, first resistor and second resistance；
One end of the first resistor is electrically connected with the power supply output end of the power module, the other end of the first resistor with
The input terminal of the electric-controlled switch is electrically connected, and the control terminal of the electric-controlled switch and control module control connect, the electricity
The output end of control switch is electrically connected with one end of the second resistance, the other end ground connection of the second resistance, wherein the electricity
The output end that contact is the feedback signal that is electrically connected of control switch and the second resistance.
3. device for controlling power tool according to claim 2, which is characterized in that the phase line sampling module further includes third
Resistance, the control module are equipped with automatically controlled power supply；
The control terminal of the electric-controlled switch is electrically connected with described 3rd resistor one end, the other end of the 3rd resistor and the electricity
Power electric connection is controlled, the control module controls the Push And Release of the automatically controlled power supply, to realize the Push And Release of the electric-controlled switch.
4. device for controlling power tool according to claim 2, which is characterized in that the electric-controlled switch be NMOS tube or
PMOS tube or CMOS tube or triode.
5. device for controlling power tool according to claim 1, which is characterized in that the upper bridge arm power switch is NMOS tube
Either perhaps the pliotron lower bridge arm power switch is NMOS tube or PMOS by PMOS tube or CMOS tube or IGBT
Pipe or CMOS tube or IGBT or pliotron.
6. device for controlling power tool according to claim 1, which is characterized in that the power module is lithium battery or nickel
Pneumatic cell or nickel-metal hydride battery or lead storage battery.
7. a kind of electric tool characterized by comprising device for controlling power tool as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910689084.7A CN110380668A (en) | 2019-07-29 | 2019-07-29 | A kind of device for controlling power tool and electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910689084.7A CN110380668A (en) | 2019-07-29 | 2019-07-29 | A kind of device for controlling power tool and electric tool |
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| CN110380668A true CN110380668A (en) | 2019-10-25 |
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|---|---|---|---|
| CN201910689084.7A Pending CN110380668A (en) | 2019-07-29 | 2019-07-29 | A kind of device for controlling power tool and electric tool |
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| CN105322836A (en) * | 2014-07-04 | 2016-02-10 | 海德堡印刷机械股份公司 | Braking circuit in alternating current loop |
| CN105471360A (en) * | 2014-09-29 | 2016-04-06 | 日立汽车系统株式会社 | Electric Motor Drive Control Device, Electrically Driven Power Steering Device, Electrically Driven Brake Device, and Electrically Driven Pump Device |
| CN210201753U (en) * | 2019-07-29 | 2020-03-27 | 斯泰宝机电科技(昆山)有限公司 | Electric tool controller and electric tool |
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2019
- 2019-07-29 CN CN201910689084.7A patent/CN110380668A/en active Pending
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| CN101364781A (en) * | 2008-07-01 | 2009-02-11 | 上海大学 | Position-sensorless control device for wide speed regulating range brushless DC motor without filter |
| CN102545749A (en) * | 2012-01-06 | 2012-07-04 | 上海大学 | Wide-speed-regulation-range brushless direct current motor position sensorless control device and method |
| CN105322836A (en) * | 2014-07-04 | 2016-02-10 | 海德堡印刷机械股份公司 | Braking circuit in alternating current loop |
| CN105471360A (en) * | 2014-09-29 | 2016-04-06 | 日立汽车系统株式会社 | Electric Motor Drive Control Device, Electrically Driven Power Steering Device, Electrically Driven Brake Device, and Electrically Driven Pump Device |
| CN210201753U (en) * | 2019-07-29 | 2020-03-27 | 斯泰宝机电科技(昆山)有限公司 | Electric tool controller and electric tool |
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