CN203399033U - Control circuit of electric tool - Google Patents
Control circuit of electric tool Download PDFInfo
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- CN203399033U CN203399033U CN201320554024.2U CN201320554024U CN203399033U CN 203399033 U CN203399033 U CN 203399033U CN 201320554024 U CN201320554024 U CN 201320554024U CN 203399033 U CN203399033 U CN 203399033U
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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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
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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
- H02P31/00—Arrangements for regulating or controlling electric motors not provided for in groups H02P1/00 - H02P5/00, H02P7/00 or H02P21/00 - H02P29/00
Abstract
The utility model relates to a control circuit of an electric tool. The control circuit of the electric tool includes a lithium battery, a brushless DC motor, a power circuit, a signal detection input circuit, a main control chip, a Hall detection circuit, a three-phase drive circuit and a current detection circuit. The power circuit is connected with the lithium battery and related circuit modules. The signal detection circuit and the current detection circuit are connected with the main control chip. The current detection circuit is also connected with the three-phase drive circuit. The three-phase drive circuit and the Hall detection circuit are connected between the main control chip and the brushless DC motor. Compared with the prior art, the control circuit of the electric tool has advantages that operation safety and stability of the electric tool can be improved effectively by adding the signal detecting circuit modules; and sparks produced by mechanical commutation are removed and noise is reduced by replacing a brush DC motor with the brushless DC motor.
Description
Technical field
The utility model relates to a kind of control circuit, specifically a kind of control circuit of electric tool.
Background technology
Electric tool has been widely used in the fields such as building, decoration, machinery, electric power, bridge, gardening at present, and enters in a large number family.But because general electric tool adopts interchange, lead-acid battery or Ni-MH battery power supply conventionally, or employing has brushless motor, there is the bad shortcomings more or less such as structure is heavier, use is inconvenient, noise great Yi affects nearby device, mechanical commutation generation spark, energy loss is large, dynamic characteristic is bad.In order to overcome above-mentioned undesirable element, reach lightly portable, easy to use, reduce interfering noise, strengthen the object of instrument dynamic characteristic, the brush-less Dc motor tool solution that adopts lithium battery group to do power can meet these requirements substantially.
Summary of the invention
For above-mentioned prior art, the technical problems to be solved in the utility model is to provide a kind of control circuit of electric tool.
In order to address the above problem, the control circuit of electric tool of the present utility model, is connected between lithium battery group and brshless DC motor, comprises
Main control chip, for controlling each circuit coordinates work; It is characterized in that: also comprise,
Power circuit, for providing suitable power supply to each circuit, is connected between lithium battery group and each interlock circuit;
Three-phase drive circuit, receives the control signal that main control chip is exported, and drives or stops machine operation, is connected between main control chip and brshless DC motor;
Input input circuit, for detection of speed governing input signal, detection battery pack temperature signal, detection battery voltage signal, detection forward/inversion input signal, is connected with main control chip;
Hall testing circuit, is provided for the working power of motor hall device, and the connection of hall signal input, is connected between main control chip and brshless DC motor;
Current detection circuit, the operating current of detection motor, its signals collecting end connects three-phase drive circuit, and its signal output part connects main control chip.
Preferably, described input input circuit comprises
Pull-up resistor R38 and diverter switch S2, for detection of brshless DC motor just/reversion, the port 2 of diverter switch S2 connects by the pull-up resistor R38 pin corresponding with main control chip, the pin that the port one of diverter switch S2 is corresponding with main control chip connects, and port 3 pin corresponding with main control chip of diverter switch S2 connects;
Resistance R 27, thermistor NTC1, resistance R 33 and capacitor C 16, for detection of battery pack temperature, resistance R 27 is connected with thermistor NTC1, in parallel with thermistor NTC1 after resistance R 33 and capacitor C 16 series connection, the output port that node between resistance R 33 and capacitor C 16 is detected temperatures, the pin corresponding with main control chip connects;
Adjustable resistance S1VR, resistance R 18 and capacitor C 11, for speed regulating control, after resistance R 18 and capacitor C 11 series connection, be parallel between the adjustable end and ground end of adjustable resistance S1VR, node between resistance R 18 and capacitor C 11 is the output port of speed regulating control signal, and the pin corresponding with main control chip connects.
Preferably, described power circuit comprises
Mains switch S1, controls the energising of whole circuit, and total voltage BAT+ is provided, and directly to three-phase drive circuit, powers;
Resistance R 37, capacitor C 21, resistance R 39, triode Q4, reference voltage chip U1, capacitor C 20, resistance R 40, resistance R 45 and capacitor C 22, be used for providing voltage 2V4 to input input circuit, resistance R 37 and capacitor C 21 series connection, the collector electrode of node access triode Q4 between resistance R 37 and capacitor C 21, the negative electrode of the base stage of triode Q4 and reference voltage chip U1, the reference utmost point of reference voltage chip U1 is received the node between resistance R 40 and R45, the other end of resistance R 40 is connected with the emitter of triode Q4, the collector electrode of triode Q4 and base stage are parallel with resistance R 39, resistance R 45 two ends are parallel with capacitor C 20, capacitor C 22 1 ends are received the emitter of triode Q4, other end ground connection, the transmitting of triode Q4 is the output port of voltage 2V4 very.
Preferably, described Hall testing circuit comprises the connected resistance R 46 of pin corresponding to transducer, resistance R 47 and resistance R 48, and anode diode D9, the diode D10 and the diode D11 that connect with each resistance respectively; Described diode D9, diode D10 are connected with the negative electrode of diode D11, and are connected to the pin that main control chip is corresponding.
Preferably, described three-phase drive circuit can be divided into U, V, the W three-phase drive circuit that structure is identical, wherein U circuitry phase comprises diode D1, capacitor C 3, resistance R 19, the diode D5 that forms U phase boostrap circuit, and mutually after series connection, is connected to metal-oxide-semiconductor QUH1 and the metal-oxide-semiconductor QUL1 between voltage BAT+ and ground; The source electrode of described metal-oxide-semiconductor QUH1 is connected with the drain electrode of metal-oxide-semiconductor QUL1, metal-oxide-semiconductor QUH1 is connected with U phase boostrap circuit with the node between metal-oxide-semiconductor QUL1, the grid of the grid of metal-oxide-semiconductor QUH1 and metal-oxide-semiconductor QUL1 is connected to by resistance R 4 and resistance R 24 pin that main control chip is corresponding respectively, and the node output U phase signals between metal-oxide-semiconductor QUH1 and metal-oxide-semiconductor QUL1 drives brshless DC motor.
Preferably, described current detection circuit comprises resistance R 36, resistance R 55, resistance R 56 and capacitor C 32; Resistance R 55 and resistance R 56 are accessed respectively in resistance R 36 two ends, and resistance R 55 and resistance R 56 other ends are connected to the pin that main control chip is corresponding, between resistance R 55 and resistance R 56, are connected with filter capacitor C32.
Preferably, also comprise
Illumination indicating circuit, for starting shooting time illumination, guarantees that each start is not less than default lighting hours, also for whole Circuits System, warning indication when abnormal occurs, and is connected with main control chip;
Battery capacity indication circuit, shows electric weight when starting shooting, and each start is the most childlike, and in default electric weight displaying time, system cut-off is automatic distinguishing, is connected with main control chip.
Preferably, described illumination indicating circuit comprises resistance R 28 and LED 4, and resistance R 28 is connected with the anode of LED 4, the minus earth of LED 4.
Preferably, described battery capacity indication circuit comprises LED 1, LED 2, LED 3, is connected on the negative electrode of each light-emitting diode and the triode Q5 between ground, triode Q6, triode Q7 respectively; The base stage of described each triode is connected to by resistance R 34, resistance R 17 and resistance R 29 pin that main control chip is corresponding.
Compared with prior art, the utlity model has following advantage: one, adding of each signal deteching circuit module, can effectively improve the safety and stability of electric tool operation; Two, with brshless DC motor, replace having brushless motor, the spark that machinery-free commutation produces, noise decrease.
Accompanying drawing explanation
Fig. 1 is the control circuit module map of the electric tool of the utility model enforcement.
Fig. 2 is that power circuit, the illumination that the utility model is implemented indicated, electric weight shows and the connecting circuit figure of input input circuit four module.
Fig. 3 is main control chip and the peripheral interlock circuit circuit diagram thereof that the utility model is implemented.
Fig. 4 is the three-phase drive circuit circuit diagram that the utility model is implemented.
Embodiment
In order to allow those skilled in the art understand better the technical solution of the utility model, below in conjunction with accompanying drawing, the utility model is further elaborated.
As shown in Figure 1 to 4, a kind of control circuit of electric tool, comprises power circuit 5 to embodiment of the present utility model, illumination indicating circuit 1, battery capacity indication circuit 2, input input circuit 3, main control chip 4, Hall testing circuit 6, three-phase drive circuit 7, current detection circuit 8.
Wherein, main control chip 4, for controlling each circuit coordinates work;
Three-phase drive circuit 7, receives the control signal that main control chip 4 is exported, and drives or stops machine operation, is connected between main control chip 4 and brshless DC motor;
Battery capacity indication circuit 2, shows electric weight when starting shooting, and each start is the most childlike, and in default electric weight displaying time, system cut-off is automatic distinguishing, is connected with main control chip 4.
Pull-up resistor R38 and diverter switch S2, for detection of brshless DC motor just/reversion, the port 2 of diverter switch S2 connects by the pull-up resistor R38 pin corresponding with main control chip 4, the pin that the port one of diverter switch S2 is corresponding with main control chip 4 connects, and port 3 pin corresponding with main control chip 4 of diverter switch S2 connects;
Resistance R 27, thermistor NTC1, resistance R 33 and capacitor C 16, for detection of battery pack temperature, resistance R 27 is connected with thermistor NTC1, in parallel with thermistor NTC1 after resistance R 33 and capacitor C 16 series connection, the output port that node between resistance R 33 and capacitor C 16 is detected temperatures, the pin corresponding with main control chip 4 connects;
Adjustable resistance S1VR, resistance R 18 and capacitor C 11, for speed regulating control, after resistance R 18 and capacitor C 11 series connection, be parallel between the adjustable end and ground end of adjustable resistance S1VR, node between resistance R 18 and capacitor C 11 is the output port of speed regulating control signal, and the pin corresponding with main control chip 4 connects.
Mains switch S1, controls the energising of whole circuit, and total voltage BAT+ is provided, and directly gives three-phase drive circuit 7 power supplies;
Resistance R 37, capacitor C 21, resistance R 39, triode Q4, reference voltage chip U1, capacitor C 20, resistance R 40, resistance R 45 and capacitor C 22, be used for providing voltage 2V4 to input input circuit 3, resistance R 37 and capacitor C 21 series connection, the collector electrode of node access triode Q4 between resistance R 37 and capacitor C 21, the negative electrode of the base stage of triode Q4 and reference voltage chip U1, the reference utmost point of reference voltage chip U1 is received the node between resistance R 40 and R45, the other end of resistance R 40 is connected with the emitter of triode Q4, the collector electrode of triode Q4 and base stage are parallel with resistance R 39, resistance R 45 two ends are parallel with capacitor C 20, capacitor C 22 1 ends are received the emitter of triode Q4, other end ground connection, the transmitting of triode Q4 is the output port of voltage 2V4 very.
Battery capacity indication circuit 2 comprises LED 1, LED 2, LED 3, is connected on the negative electrode of each light-emitting diode and the triode Q5 between ground, triode Q6, triode Q7 respectively; The base stage of described each triode is connected to the pin of main control chip 4 correspondences by resistance R 34, resistance R 17 and resistance R 29.
Three-phase drive circuit 7 can be divided into U, V, the W three-phase drive circuit that structure is identical, wherein U circuitry phase comprises diode D1, capacitor C 3, resistance R 19, the diode D5 that forms U phase boostrap circuit, and mutually after series connection, is connected to metal-oxide-semiconductor QUH1 and the metal-oxide-semiconductor QUL1 between voltage BAT+ and ground; The source electrode of described metal-oxide-semiconductor QUH1 is connected with the drain electrode of metal-oxide-semiconductor QUL1, metal-oxide-semiconductor QUH1 is connected with U phase boostrap circuit with the node between metal-oxide-semiconductor QUL1, the grid of the grid of metal-oxide-semiconductor QUH1 and metal-oxide-semiconductor QUL1 is connected to respectively the pin of main control chip 4 correspondences by resistance R 4 and resistance R 24, the node output U phase signals between metal-oxide-semiconductor QUH1 and metal-oxide-semiconductor QUL1 drives brshless DC motor.
After switch S 1 closure, first obtain supply voltage BAT+; Resistance R 2 and capacitor C 8 form RC filter, through one-way conduction diode D4, and the amplitude of voltage stabilizing didoe Z1 restriction output voltage V CC, through current-limiting resistance R1, filter capacitor C6, capacitor C 7 filtering, export metastable voltage VCC to main control chip; Thereby lithium battery group voltage makes triode Q3 conducting through biasing resistor R15, resistance R 23 dividing potential drops, the potential-divider network that resistance R 3, resistance R 14, resistance R 22 form makes metal-oxide-semiconductor Q1 conducting obtain voltage VLED; Voltage VCC branch is through resistance R 37, capacitor C 21 filtering.Resistance R 39 provides the biasing of triode Q4, resistance R 40, and resistance R 45 composition feedback networks offer reference voltage chip U1 and keep transistor base stable, thereby keep constant voltage 2V4 output.Capacitor C 20 filtering interfering clutters, capacitor C 22 filtering ripples.
Voltage VLED drives LED 4 through resistance R 28 current limlitings, and LED 4 provides illumination functions.As there is any alarm signal, LED 4 flickers, to point out in operation irregularity state.
The electric current of three-phase drive circuit 7 resistance R 36 of flowing through, through resistance R 55, resistance R 56, filter capacitor C32 is input to main control chip, through inner 10 bits AD conversion process, obtains real-time current value.
The Hall element signal of brshless DC motor inside is through resistance R 46, resistance R 47, and resistance R 48 is input to main control chip and does rotor-position judgement and process.Diode D9, diode D10, diode D11 plays clamping effect.
Main control chip is the controller of the integrate motor pre-driver of a single supply, has the high-end predrive of 6 passage PWM and low side predrive, built-in charge pump change-over circuit.With the outside three-phase drive circuit control brshless DC motor that combines.
Capacitor C 26, capacitor C 27 is for the filtering of main control chip core power; Capacitor C 25 is for main control chip internal electric source V3P3D filtering; Capacitor C 23, capacitor C 24 is for main control chip internal electric source V7A filtering; Resistance R 52, capacitor C 28, capacitor C 29 is for main control chip internal electric source V7P and V7PDRV filtering.Capacitor C 30 is main control chip internal electric source V3P3A filtering.
Diode D1, capacitor C 3, resistance R 19, diode D5 forms U phase boostrap circuit.When U phase metal-oxide-semiconductor QUL1 is in conducting phase, power supply V7P voltage is through diode D1, capacitor C 3, and resistance R 19, U phase metal-oxide-semiconductor QUL1 charges to C3 in loop.When metal-oxide-semiconductor, QUL1 closes, QUH1 conducting phase, and 3 times terminal voltages of capacitor C rise to BAT+, in capacitor C 3, terminal voltage rises to V7P+BAT+, this bootstrap voltage mode is input to main control chip through port UBOOT, through internal circuit, processes, and outputs to port UHSD to drive high-end metal-oxide-semiconductor QUH1.Resistance R 11 is GS (grid source) pull down resistors of metal-oxide-semiconductor QUH1, the GS voltage of voltage-stabiliser tube Z3 restriction metal-oxide-semiconductor QUH1.Resistance R 24, resistance R 30, voltage-stabiliser tube Z6, metal-oxide-semiconductor QUL1 forms U phase low side and drives.Resistance R 30 is GS pull down resistors of metal-oxide-semiconductor QUL1, the GS voltage of voltage-stabiliser tube Z6 restriction metal-oxide-semiconductor QUL1.
Diode D2, capacitor C 4, resistance R 20, diode D6 forms V phase boostrap circuit.When V phase metal-oxide-semiconductor QVL1 is in conducting phase, power supply V7P voltage is through diode D2, capacitor C 4, and resistance R 20, V phase metal-oxide-semiconductor QVL1 charges to C4 in loop.When metal-oxide-semiconductor, QVL1 closes, QVH1 conducting phase, and 4 times terminal voltages of capacitor C rise to BAT+, in capacitor C 4, terminal voltage rises to V7P+BAT+, this bootstrap voltage mode is input to main control chip through port VBOOT, through internal circuit, processes, and outputs to port VHSD to drive high-end metal-oxide-semiconductor QVH1.Resistance R 12 is GS (grid source) pull down resistors of metal-oxide-semiconductor QVH1, the GS voltage of voltage-stabiliser tube Z4 restriction metal-oxide-semiconductor QVH1.Resistance R 25, resistance R 31, voltage-stabiliser tube Z7, metal-oxide-semiconductor QVL1 forms V phase low side and drives.Resistance R 31 is GS pull down resistors of metal-oxide-semiconductor QVL1, the GS voltage of voltage-stabiliser tube Z7 restriction metal-oxide-semiconductor QVL1.
Diode D3, capacitor C 5, resistance R 21, diode D7 forms W phase boostrap circuit.When W phase metal-oxide-semiconductor QWL1 is in conducting phase, power supply V7P voltage is through diode D3, capacitor C 5, and resistance R 21, W phase metal-oxide-semiconductor QWL1 charges to C5 in loop.When metal-oxide-semiconductor, QWL1 closes, QWH1 conducting phase, and 5 times terminal voltages of capacitor C rise to BAT+, in capacitor C 5, terminal voltage rises to V7P+BAT+, this bootstrap voltage mode is input to main control chip through WBOOT, through internal circuit, processes, and outputs to port WHSD to drive high-end metal-oxide-semiconductor QWH1.Resistance R 13 is GS (grid source) pull down resistors of metal-oxide-semiconductor QWH1, the GS voltage of voltage-stabiliser tube Z5 restriction metal-oxide-semiconductor QWH1.Resistance R 26, resistance R 32, voltage-stabiliser tube Z8, metal-oxide-semiconductor QWL1 forms W phase low side and drives.Resistance R 32 is GS pull down resistors of metal-oxide-semiconductor QWL1, the GS voltage of voltage-stabiliser tube Z8 restriction metal-oxide-semiconductor QWL1.
Main control chip is controlled three-phase drive circuit output according to the information detecting.Detailed process is as follows:
Current detection signal CSP/CSN, through the inner 10 bits AD conversions of main control chip, obtain real-time working current value, if this current value is less than the maximum operating currenbt value setting, the U/V/W three-phase PWM signal that main control chip is exported corresponding duty ratio so, to three-phase drive circuit, drives brshless DC motor work.Otherwise main control chip is closed U/V/W three-phase PWM signal, stop brshless DC motor work.
Hall detection signal, through main control chip analyzing and processing, does not occur that hall signal is abnormal, and the U/V/W three-phase PWM signal that main control chip is exported corresponding duty ratio so, to three-phase drive circuit, drives brshless DC motor work.As there is broken string or during short circuit condition, main control chip is closed U/V/W three-phase PWM signal, stops brshless DC motor work.
Speed-regulating signal SV, through the inner 10 bits AD conversions of main control chip, obtains reference velocity, and main control chip is exported the U/V/W three-phase PWM signal of corresponding duty ratio to three-phase drive circuit, drives brshless DC motor.
Voltage detection signal BAT_AD is through the inner 10 bits AD conversions of main control chip, obtain lithium battery group real-time voltage, if this voltage is between+15V-24V, the U/V/W three-phase PWM signal that main control chip is exported corresponding duty ratio so, to three-phase drive circuit, drives brshless DC motor work.Otherwise main control chip is closed U/V/W three-phase PWM signal, stop brshless DC motor work.
Temperature detection signal BAT_NTC is through the inner 10 bits AD conversions of main control chip, obtain lithium battery group real time temperature, if this temperature is between 0 ℃-45 ℃, the U/V/W three-phase PWM signal that main control chip is exported corresponding duty ratio so, to three-phase drive circuit, drives brshless DC motor work.Otherwise main control chip is closed U/V/W three-phase PWM signal, stop brshless DC motor work.
Just/measurement of converse rotation signal CW/CCW reads through main control chip, and the U/V/W three-phase PWM signal that main control chip is exported corresponding duty ratio according to following table is to three-phase drive circuit.
| Output state | Stop output | Forward | Reversion | Stop output |
| CW level | 0 | 1 | 0 | 1 |
| CCW level | 0 | 0 | 1 | 1 |
It is more than preferably implementation of the utility model; it should be noted that; in the situation that not deviating from the utility model spirit and essence thereof; those of ordinary skill in the art are when making various corresponding changes and distortion according to the utility model, but these changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (9)
1. a control circuit for electric tool, is connected between lithium battery group and brshless DC motor, comprises
Main control chip (4), for controlling each circuit coordinates work; It is characterized in that: also comprise,
Power circuit (5), for providing suitable power supply to each circuit, is connected between lithium battery group and each interlock circuit;
Three-phase drive circuit (7), receives the control signal that main control chip (4) is exported, and drives or stops machine operation, is connected between main control chip (4) and brshless DC motor;
Input input circuit (3), for detection of speed governing input signal, detection battery pack temperature signal, detection battery voltage signal, detection forward/inversion input signal, is connected with main control chip (4);
Hall testing circuit (6), is provided for the working power of motor hall device, and the connection of hall signal input, is connected between main control chip (4) and brshless DC motor;
Current detection circuit (8), the operating current of detection motor, its signals collecting end connects three-phase drive circuit (7), and its signal output part connects main control chip (4).
2. the control circuit of electric tool according to claim 1, is characterized in that, described input input circuit (3) comprises
Pull-up resistor R38 and diverter switch S2, for detection of brshless DC motor just/reversion, the port 2 of diverter switch S2 connects by the pull-up resistor R38 pin corresponding with main control chip (4), the pin that the port one of diverter switch S2 is corresponding with main control chip (4) connects, and the pin that the port 3 of diverter switch S2 is corresponding with main control chip (4) connects;
Resistance R 7, resistance R 16 and capacitor C 9, for detection of battery voltage, after resistance R 7 is composed in series potential-divider network with resistance R 16, outside connected switch S1 holds with ground, capacitor C 9 is parallel to resistance R 16 two ends, node between resistance R 7 and resistance R 16 is for detecting Voltage-output port, and the pin corresponding with main control chip (4) connects;
Resistance R 27, thermistor NTC1, resistance R 33 and capacitor C 16, for detection of battery pack temperature, resistance R 27 is connected with thermistor NTC1, in parallel with thermistor NTC1 after resistance R 33 and capacitor C 16 series connection, the output port that node between resistance R 33 and capacitor C 16 is detected temperatures, the pin corresponding with main control chip (4) connects;
Adjustable resistance S1VR, resistance R 18 and capacitor C 11, for speed regulating control, after resistance R 18 and capacitor C 11 series connection, be parallel between the adjustable end and ground end of adjustable resistance S1VR, node between resistance R 18 and capacitor C 11 is the output port of speed regulating control signal, and the pin corresponding with main control chip (4) connects.
3. the control circuit of electric tool according to claim 2, is characterized in that, described power circuit (5) comprises
Mains switch S1, controls the energising of whole circuit, and total voltage BAT+ is provided, and directly gives three-phase drive circuit (7) power supply;
Resistance R 2, capacitor C 8, diode D4, resistance R 1, capacitor C 6, voltage stabilizing didoe Z1 and capacitor C 7, be used for providing voltage VCC to main control chip (4), resistance R 2 is connected with capacitor C 8, in parallel with capacitor C 8 after diode D4, resistance R 1 and capacitor C 6 series connection, it is in parallel with C6 after voltage stabilizing didoe Z1 and capacitor C 7 are in parallel, node between resistance R 1 and capacitor C 6 is the output port of voltage VCC, and the pin corresponding with main control chip (4) connects;
Resistance R 3, resistance R 14, metal-oxide-semiconductor Q1, voltage-stabiliser tube Z2, resistance R 22, capacitor C 13, triode Q3, resistance R 15, resistance R 23, resistance R 35 and triode Q2, be used for providing voltage VLED to illumination indicating circuit (1) and electric quantity display circuit (2), resistance R 15 is connected with resistance R 23, the collector electrode of triode Q2 and emitter are connected in parallel in resistance R 23, wherein, the grounded emitter of triode Q2, the base stage of triode Q2 is connected with resistance R 35, the base stage of node access triode Q3 between resistance R 15 and resistance R 23, the grounded emitter of triode Q3, the collector electrode of triode Q3 is connected to the node between resistance R 14 and capacitor C 23 by resistance R 22, the grid of the other end of resistance R 14 and metal-oxide-semiconductor Q1, the anode of voltage-stabiliser tube Z2 is connected, the negative electrode of voltage-stabiliser tube Z2 connects the source electrode of metal-oxide-semiconductor Q1, voltage-stabiliser tube Z2 two ends are parallel with resistance R 3, the drain electrode of metal-oxide-semiconductor Q1 is the output port of voltage VLED,
Resistance R 37, capacitor C 21, resistance R 39, triode Q4, reference voltage chip U1, capacitor C 20, resistance R 40, resistance R 45 and capacitor C 22, be used for providing voltage 2V4 to input input circuit (3), resistance R 37 and capacitor C 21 series connection, the collector electrode of node access triode Q4 between resistance R 37 and capacitor C 21, the negative electrode of the base stage of triode Q4 and reference voltage chip U1, the reference utmost point of reference voltage chip U1 is received the node between resistance R 40 and R45, the other end of resistance R 40 is connected with the emitter of triode Q4, the collector electrode of triode Q4 and base stage are parallel with resistance R 39, resistance R 45 two ends are parallel with capacitor C 20, capacitor C 22 1 ends are received the emitter of triode Q4, other end ground connection, the transmitting of triode Q4 is the output port of voltage 2V4 very.
4. the control circuit of electric tool according to claim 3, it is characterized in that, described Hall testing circuit (6) comprises the connected resistance R 46 of pin corresponding to transducer, resistance R 47 and resistance R 48, and anode diode D9, the diode D10 and the diode D11 that connect with each resistance respectively; Described diode D9, diode D10 are connected with the negative electrode of diode D11, and are connected to the pin that main control chip (4) is corresponding.
5. the control circuit of electric tool according to claim 4, it is characterized in that, described three-phase drive circuit (7) can be divided into U, V, the W three-phase drive circuit that structure is identical, wherein U circuitry phase comprises diode D1, capacitor C 3, resistance R 19, the diode D5 that forms U phase boostrap circuit, and mutually after series connection, is connected to metal-oxide-semiconductor QUH1 and the metal-oxide-semiconductor QUL1 between voltage BAT+ and ground; The source electrode of described metal-oxide-semiconductor QUH1 is connected with the drain electrode of metal-oxide-semiconductor QUL1, metal-oxide-semiconductor QUH1 is connected with U phase boostrap circuit with the node between metal-oxide-semiconductor QUL1, the grid of the grid of metal-oxide-semiconductor QUH1 and metal-oxide-semiconductor QUL1 is connected to by resistance R 4 and resistance R 24 pin that main control chip (4) is corresponding respectively, and the node output U phase signals between metal-oxide-semiconductor QUH1 and metal-oxide-semiconductor QUL1 drives brshless DC motor.
6. the control circuit of electric tool according to claim 5, is characterized in that, described current detection circuit (8) comprises resistance R 36, resistance R 55, resistance R 56 and capacitor C 32; Resistance R 55 and resistance R 56 are accessed respectively in resistance R 36 two ends, and resistance R 55 and resistance R 56 other ends are connected to the pin that main control chip is corresponding, between resistance R 55 and resistance R 56, are connected with filter capacitor C32.
7. the control circuit of electric tool according to claim 6, is characterized in that, also comprises
Illumination indicating circuit (1), for starting shooting time illumination, guarantees that each start is not less than default lighting hours, also for whole Circuits System, warning indication when abnormal occurs, and is connected with main control chip (4);
Battery capacity indication circuit (2), shows electric weight when starting shooting, and each start is the most childlike, and in default electric weight displaying time, system cut-off is automatic distinguishing, is connected with main control chip (4).
8. the control circuit of electric tool according to claim 7, it is characterized in that, described illumination indicating circuit (1) comprises resistance R 28 and LED 4, and resistance R 28 is connected with the anode of LED 4, the minus earth of LED 4.
9. the control circuit of electric tool according to claim 8, it is characterized in that, described battery capacity indication circuit (2) comprises LED 1, LED 2, LED 3, is connected on the negative electrode of each light-emitting diode and the triode Q5 between ground, triode Q6, triode Q7 respectively; The base stage of described each triode is connected to by resistance R 34, resistance R 17 and resistance R 29 pin that main control chip (4) is corresponding.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320554024.2U CN203399033U (en) | 2013-09-09 | 2013-09-09 | Control circuit of electric tool |
| PCT/CN2013/086525 WO2015032126A1 (en) | 2013-09-09 | 2013-11-05 | Electric tool control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320554024.2U CN203399033U (en) | 2013-09-09 | 2013-09-09 | Control circuit of electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203399033U true CN203399033U (en) | 2014-01-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320554024.2U Expired - Lifetime CN203399033U (en) | 2013-09-09 | 2013-09-09 | Control circuit of electric tool |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN203399033U (en) |
| WO (1) | WO2015032126A1 (en) |
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| WO2016082701A1 (en) * | 2014-11-27 | 2016-06-02 | 天佑电器（苏州）有限公司 | Electric tool control circuit |
| CN104506091B (en) * | 2015-01-15 | 2018-06-26 | 广州市奇虎实业有限公司 | A kind of delay control circuit of direct current generator |
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-
2013
- 2013-09-09 CN CN201320554024.2U patent/CN203399033U/en not_active Expired - Lifetime
- 2013-11-05 WO PCT/CN2013/086525 patent/WO2015032126A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105207549A (en) * | 2014-06-26 | 2015-12-30 | 南京德朔实业有限公司 | Brushless direct-current motor driving control system |
| CN105207549B (en) * | 2014-06-26 | 2019-04-19 | 南京德朔实业有限公司 | Brshless DC motor driving control system |
| WO2016082701A1 (en) * | 2014-11-27 | 2016-06-02 | 天佑电器（苏州）有限公司 | Electric tool control circuit |
| CN105700463A (en) * | 2014-11-27 | 2016-06-22 | 天佑电器（苏州）有限公司 | Control circuit of electric tool |
| US10483884B2 (en) | 2014-11-27 | 2019-11-19 | Suzhou Cleva Electric Appliance Co., Ltd | Electric tool control circuit |
| CN104506091B (en) * | 2015-01-15 | 2018-06-26 | 广州市奇虎实业有限公司 | A kind of delay control circuit of direct current generator |
| CN114312973A (en) * | 2021-12-21 | 2022-04-12 | 淮阴工学院 | Steering wheel capable of electrically adjusting position |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015032126A1 (en) | 2015-03-12 |
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