CN102545770B - Motor driving module capable of adjusting output pulse width modulation control signal - Google Patents
Motor driving module capable of adjusting output pulse width modulation control signal Download PDFInfo
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- CN102545770B CN102545770B CN201010621892.9A CN201010621892A CN102545770B CN 102545770 B CN102545770 B CN 102545770B CN 201010621892 A CN201010621892 A CN 201010621892A CN 102545770 B CN102545770 B CN 102545770B
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Abstract
The invention relates to a motor driving module capable of adjusting an output pulse width modulation control signal. The motor driving device consists of a latch forced starting device, a voltage adjusting circuit and a frequency adjusting circuit, wherein the voltage adjusting circuit is formed outside the latch forced starting device; the latch forced starting device comprises a comparator and a motor starting controller; the comparator is provided with a first input end and a second input end; the first input end is connected with the external voltage adjusting circuit and a switch; the first input end of the motor starting controller is connected with a pulse wave generator, the other input end of the motor starting controller is connected with an oscillator, and an output end of the motor starting controller is connected with the switch; and the motor starting controller is controlled to output a high-voltage signal to control the switch so as to control an output pulse width modulation signal of the comparator through a pulse wave signal generated by the pulse wave generator and counting to a set time by the oscillator.
Description
Technical field
The invention relates to a kind of motor driving module of adjusting motor rotary speed that has, particularly relevant for a kind of use in the motor driving module without under microcontroller pattern, by the design of an external circuit and a motor drive, pulse width modulation (PWM) rotary speed signal that the drive unit of motor is exported can be adjusted according to external circuit.
Background technology
Because consumer products have diversified characteristic, simultaneously in order to reduce the manufacturing cost of product, some do not have the consumer products of microcontroller pattern (Non-MCU), such as: the products such as hair-dryer, microwave oven, baking box, instrument or light-emitting diode (LED) lighting device, all do not configure micromonitor system; In addition, the demand of the heat radiation of these products is not identical yet.Therefore when a motor driving module is used under the operator scheme without microcontroller signal, owing to not having micromonitor system to provide pulse width modulation (PWM) to control the relation of signal, the motor driving module of this class make the motor driving module of this type to produce the rotating speed of controlling motor via pulse width modulation (PWM) signal, therefore can only come CD-ROM drive motor to reach the function of heat radiation with fixed rotating speed.
In order to make these uses can produce according to the radiating requirements of product the rotating speed of required motor in the motor driving module without under microcontroller pattern, its method of adjusting motor rotary speed can have lower several, and the first is to change motor load, as shown in Figure 1A; The second is the pattern that changes operating voltage, as shown in Figure 1B.So these two kinds of modes have the restriction of its application aspect, and in the mode of the change motor load shown in Figure 1A, when being applied in the fan of some small sizes and low load, the method has the restriction of its coiling.And in the mode of the change operating voltage shown in Figure 1B, have the complexity that minimum operating voltage restriction and voltage must change because of different application.Solving at present the mode that changes voltage, is to reach different application demands at the load end resistance of connecting, as shown in Figure 1A; But the method has a very large shortcoming, the power that increases consumption exactly, thereby the efficiency of reduction fan motor.
In addition, when motor is in slow-speed of revolution application, the problem that can run into comprises: first, owing to using in the motor driving module without micromonitor system, itself cannot judge whether motor has started, and can only carry out with the starting power setting CD-ROM drive motor; But starting torque (torque) required while just having started due to motor is larger, so when motor is while being in slow-revving setting, the moment (torque) of starting may be not enough, and cause motor when just starting to start, and has the possibility that cannot get into smooth.Secondly, after motor is subject to the impact of external force or irresistible factor and causes motor to stop, when motor starts again, also can, because of the relation of starting torque, cause motor again to start.Therefore,, if after cannot starter motor, motor driving module still continues, according to setting when voltage is provided to motor, except increasing consumption power, also likely to cause motor to burn.
Summary of the invention
In order to solve aforesaid problem, a main purpose of the present invention is disclosing a kind of outside in motor driving module external circuit again, by the design of this external circuits, make motor driving module can produce the function of different pulse width modulation (PWM) output signal, therefore do not having under the situation of micromonitor system, motor driving module of the present invention can the application for motor rotary speed in response to different product, except improving the restriction of voltage and motor coiling, because not be used in load end, be connected in series again a resistance, therefore improved the operating efficiency of motor.
In addition, another main purpose of the present invention is providing a kind of motor driving module that breech lock is forced starting device that has, do not having under the situation of micromonitor system, by the breech lock in motor driving module, forcing starting device to reset the motor that pins or stop operating.
Moreover, of the present invention also have a main purpose that a kind of motor driving module that can adjust the charging interval is being provided, do not having under the situation of micromonitor system, by adjusting vibration and the noise of suitable charging interval when reducing motor and resetting, motor driving module of the present invention can be used on sophisticated product or device.
According to above-mentioned object, the invention provides a kind of adjusting output pulse width modulation (PWM) and control the motor driving module of signal, this motor driving module is by a motor drive, one voltage-regulating circuit and a frequency regulating circuit that is formed at this motor drive outside forms, being characterized as of this motor driving module: motor drive comprises a comparator, it has a first input end and one second input, and first input end is connected with external voltage Circuit tuning, wherein external voltage Circuit tuning is one by least one resistance and the formed charging circuit of at least one electric capacity, in order to one first voltage to be provided, and a triangular wave generator, its output is connected with the second input of comparator, and its input is connected with frequency regulating circuit, in order to export a triangular wave signal to the second input of this comparator, by comparator by the first voltage and triangular wave signal relatively after, by the output of comparator, export a pulse width modulation (PWM) and control signal.
The present invention then provides a kind of motor driving module that breech lock is forced starting device that has again, voltage-regulating circuit and a frequency regulating circuit that this motor driving module forces starting device, to be formed at this breech lock pressure starting device outside by a breech lock are formed, being characterized as of this motor driving module: breech lock forces starting device to comprise: a comparator, it has a first input end and one second input, and first input end is connected with external voltage Circuit tuning and a switch; And a breech lock pressure starter, its first input end is connected with a pulse generator, and its another input is connected with an oscillator, and its output is connected with switch; The pulse wave signal producing by pulse generator and oscillator count up to a setting-up time and control breech lock and force starter to export a signal to carry out control switch, to control the output signal of comparator.
The present invention provides a kind of motor control system again, by an adjusting output pulse width modulation (PWM), to be controlled the motor driving module of signal, one output unit being connected with this motor driving module and a motor being connected with this output unit, and this motor driving module is by a motor drive, one external voltage Circuit tuning and a formed frequency regulating circuit of capacitor form, wherein, being characterized as of this motor driving module: motor drive comprises a comparator, it has a first input end and one second input, and first input end is connected with external voltage Circuit tuning and a switch, and one breech lock force starter, its first input end is connected with a pulse generator, its another input is connected with an oscillator, and its output is connected with switch, the pulse wave signal producing by pulse generator and oscillator count up to a setting-up time and control breech lock and force starter to export a signal to carry out control switch, to control the output signal of comparator, and export a pulse width modulation (PWM) while controlling signal by the output of comparator, and this pulse width modulation (PWM) is controlled to signal and deliver to output unit, with CD-ROM drive motor, rotate.
Accompanying drawing explanation
Figure 1A is a kind of motor drive schematic diagram that changes in the prior art motor load;
Figure 1B is a kind of motor drive schematic diagram that changes in the prior art operating voltage;
Fig. 2 A and Fig. 2 B are the schematic diagrames that motor drive of the present invention and voltage level are adjusted;
Fig. 3 is the function block schematic diagram that the motor driving module of signal is controlled in adjusting output pulse width modulation of the present invention (PWM);
Fig. 4 is the schematic diagram of an embodiment of adjusting output pulse width of the present invention modulation (PWM) motor driving module of controlling signal;
Fig. 5 is the output signal schematic diagram of motor drive of the present invention; And
Fig. 6 is the schematic diagram that breech lock is forced the motor-driven system of starting device and controlled single-phase motor that has of the present invention;
Fig. 7 is the function block schematic diagram that breech lock of the present invention is forced starting device;
Fig. 8 is the signal schematic diagram that corresponding breech lock of the present invention is forced starting device.
Fig. 9 is the schematic diagram that signal and charging voltage waveform are controlled in pulse width modulation of the present invention (PWM).
Main element symbol description
10 motor drives
11 comparators
13 triangular wave generators
15 pulse width modulations (PWM) controller
16 oscillators
17 Hall voltages
18 pulse generators
19 breech locks are forced starter
20 external voltage Circuit tunings
30 external frequency regulating circuits
200 output units
210/220 output circuit
300 motors
310 Hall elements
Sw1 switch
Embodiment
For clearly demonstrating the operating process of motor driving module of the present invention, in following declarative procedure, be to take single-phase motor to be illustrated as embodiment; Yet application of the present invention is not confined to the application of single-phase motor, it also can use in the application of multi-phase motor.Meanwhile, the single-phase motor that motor driving module of the present invention will drive or multi-phase motor are all identical with current used motor, therefore in following explanation, not to single-phase motor or the type of drive of multi-phase motor elaborates.In following explanation, main exposure in detail motor drive of the present invention.
First, please refer to Fig. 2 A and Fig. 2 B, is the schematic diagram that motor drive of the present invention and voltage level are adjusted.As shown in Figure 2 A, this external circuit can be a resistance of connecting with motor drive 10 to R1/R2, wherein the first end of resistance R 1 is connected with a voltage, and this voltage can be Hall voltage (VHB); The second end of resistance R 1 is connected with the first end of resistance R 2, and the second end of resistance R 2 is to be connected with earth point (GND); And then the second end of resistance R 1 is connected with the first end of resistance R 2 and a pin of motor drive 10; After the voltage being connected with resistance R 1 first end is fixing, can adjust voltage level (VRS) by resistance R 1 and the resistance value of resistance R 2, as shown in Figure 2 B.In addition, motor drive 10 also provides pulse width modulation (CPWM) pin and is connected to a capacitor C v; Triangle wave frequency can produce triangular wave by the charging/discharging function of this external capacitor C v, so can be adjusted by external capacitor Cv.
Then, please refer to Fig. 3, is the function block schematic diagram that the motor driving module of signal is controlled in adjusting output pulse width modulation of the present invention (PWM).As shown in Figure 3, motor driving module of the present invention is comprised of a motor drive 10, the formed external circuit of a pair of resistance and a formed external frequency regulating circuit of capacitor; Wherein motor drive 10 comprises: a comparator 11, its first input end is connected with a resistance R 3, its second input is connected with a triangular wave generator 13, through comparator 11, compare after two input voltages, comparator 11 is by an output output pulse width modulation (PWM) output voltage signal C
out; A pulse width modulation (PWM) controller 15, pulse width modulation (PWM) the output voltage C that its input and comparator 11 outputs are exported
outconnect, this pulse width modulation (PWM) controller 15 can be further by pulse width modulation (PWM) output voltage signal C
outconvert the pulse width modulation (PWM) after overvoltage value modulation (Level Shift) to and control signal, in order to control a motor drive unit (not being shown in this figure).In one embodiment of this invention, this motor drive 10 can manufacture a chip with a plurality of pins, therefore resistance R 3 can be as the protective circuit and the current-limiting function that prevent static discharge (ESD); Clearly, motor drive 10 of the present invention also can select not configure resistance R 3.Simultaneously, in order to make triangular wave generator 13 of the present invention there is the function of adjusting triangle wave frequency, therefore an external frequency regulating circuit 30 is further provided, and this external frequency regulating circuit 30 is connected with the triangular wave generator 13 in motor drive 10, admittedly can adjust by this external frequency regulating circuit 30 the triangular wave frequency of triangular wave generator 13.In addition, be stressed that, the pulse width modulation in the present embodiment (PWM) controller 15, its topmost object is by pulse width modulation (PWM) the output voltage C of comparator 11 outputs
outcarry out magnitude of voltage modulation (Level Shift), with in response to different electrical voltage systems; For example 3V signal is changed into 5V or the output of 12V.When if system does not need to adjust voltage, also pulse width modulation (PWM) controller 15 can be omitted.
Following, please refer to Fig. 4, is the schematic diagram of an embodiment of adjusting output pulse width of the present invention modulation (PWM) motor driving module of controlling signal.As shown in Figure 4, the connected mode of comparator 11, triangular wave generator 13 and pulse width modulation (PWM) controller 15 of the present embodiment in motor drive 10 is identical with Fig. 3; In the present embodiment, be further to disclose an embodiment and the execution mode thereof of an applied voltage Circuit tuning and external frequency regulating circuit.
Please continue to refer to Fig. 4, external voltage Circuit tuning 20 can be a resistance of connecting with motor drive 10 to R1/R2, wherein the first end of resistance R 1 is connected with a voltage, and this voltage can be Hall voltage 17 (VHB); The second end of resistance R 1 is connected with the first end of resistance R 2, and the second end of resistance R 2 is to be connected with earth point (GND); And then the second end of resistance R 1 is connected with the first end of resistance R 2 and a pin of motor drive 10, and this pin is to be connected with the first input end of comparator 11; After the voltage being connected with resistance R 1 first end is fixing, in response to different speed demand, can adjust voltage level (VRS) by resistance R 1 and the formed bleeder circuit of resistance value of resistance R 2, wherein, the Hall voltage 17 being connected with the first end of resistance R 1 can be configured in motor drive 10, and it can be also that voltage source by motor drive 10 outsides provides; And in a preferred embodiment, Hall voltage 17 is to be configured in motor drive 10.
Then, the external frequency regulating circuit 30 of the present embodiment is a capacitor Cv, and this capacitor Cv is connected with the formed pin of input of triangular wave generator 13 in motor drive 10; Therefore, the present embodiment can pass through the selection to the capacitance of capacitor Cv, adjusts the triangle wave frequency that triangular wave generator 13 produces.
When the resistance of external voltage Circuit tuning 20 to the resistance value of R1/R2 and the Hall voltage 17 that is connected with resistance R 1 all after design and determining, can determine the voltage level (VRS) of the first input end in comparator 11; Again when the capacitor Cv of external frequency regulating circuit 30 is also after design and definite capacitance, triangular wave generator 13 can produce according to the capacitance of capacitor Cv the triangular wave (being pulse width modulation CPWM signal) of a characteristic frequency, and is inputted by the second input of comparator 11.Therefore, comparator 11 in motor drive 10 of the present invention, can cut with the triangular wave that triangular wave generator 13 produces through the voltage level (VRS) of first end input, to produce the signal of a pulse width modulation (PWM) and to be exported by the output of comparator 11, as shown in Figure 5; For example, after the triangular wave of characteristic frequency is determined, can cut by voltage level (VRS) and triangular wave, when voltage level (VRS) more approaches high levels, the work Duties Ren Week phase (DUTY CYCLE) of its pulse width modulation cutting out (PWM) signal is less; And when voltage level (VRS) more approaches low level, the responsibility cycle (DUTY CYCLE) of its pulse width modulation cutting out (PWM) signal is larger.The pulse width modulation that this is cut out (PWM) signal is after pulse width modulation (PWM) controller 15 is done magnitude of voltage modulation (Level Shift), i.e. signal is controlled in an exportable pulse width modulation (PWM) of controlling motor rotary speed.Clearly, after the resistance value of the designed external voltage Circuit tuning 20 of the radiating requirements of product and the capacitance of external frequency regulating circuit 30, and can produce a specific pulse width modulation (PWM) signal.Therefore, after design by external voltage Circuit tuning 20 and external frequency regulating circuit 30, make motor drive 10 not have micro-control unit to provide under the situation of pulse width modulation (PWM) control signal, also can reach output pulse width modulation (PWM) the control signal of adjusting motor drive 10, to meet the radiating requirements of each product.Similarly, at this, to emphasize, pulse width modulation in the present embodiment (PWM) controller 15, its topmost object is that pulse width modulation (PWM) the news signal of comparator 11 output is carried out to magnitude of voltage modulation (Level Shift), with in response to different electrical voltage systems; For example 3V signal is changed into 5V or the output of 12V; Therefore pulse width modulation (PWM) controller 15 can optionally configure.
First please refer to Fig. 6, is the schematic diagram that breech lock is forced the motor-driven system of starting device and controlled single-phase motor that has of the present invention.As shown in Figure 6, motor-driven system 1 comprises a motor drive 10 and single-phase motor 300 output units 200; Wherein motor drive 10 is comprised of comparator 11, triangular wave generator 13, external voltage Circuit tuning 20 and external frequency regulating circuit 30.When the pulse width modulation (PWM) that motor drive 10 is exported, controlling signal delivers in output unit 200, responsibility cycle (DUTY CYCLE) the formed driving voltage of exporting by pulse width modulation (PWM) control signal controls output circuit 210 and output circuit 220 provides current to for example, coil on motor 300 (a kind of single-phase motor), with CD-ROM drive motor 300, rotates.Then, the Hall element 310 being arranged on motor 300 can be delivered to output unit 200 by the commutation signal of motor 300, in order to judge whether lasting the rotating of motor 300.When motor 300 continued after rotation, the pulse width modulation (PWM) that continues that motor drive 10 is exported is controlled signal and is delivered to output unit 200.At this, will emphasize, it is identical with the embodiment of Fig. 4 that signal is controlled in the pulse width modulation (PWM) that the motor drive 10 in motor-driven system 1 provides, and do not repeat them here.
In addition, pulse width modulation (PWM) that motor drive 10 of the present invention is exported is controlled signal except driving single-phase motor 300 runnings, and it also can be used for controlling three-phase motor; When motor drive 10 of the present invention is used for controlling a three-phase motor, the pulse width modulation (PWM) that similarly motor drive 10 can be exported is controlled signal and is delivered to the U/V/W coil (not being shown in figure) on three-phase motor, can be used to drive three-phase motor to rotate; Due to, the structure of three-phase motor is same as the prior art, therefore repeat no more.
Because motor driving module of the present invention is to use in without micromonitor system, therefore itself cannot judge whether motor has started, and can only control signal with the pulse width modulation (PWM) setting, carry out CD-ROM drive motor; But while just having started due to motor, needed starting torque (torque) is larger, if motor is while being set in slow-revving state, the moment (torque) of its starting starting may be not enough, and cause motor when just starting to start, have the possibility that cannot get into smooth.Secondly, after motor is subject to the impact of external force or irresistible factor and causes motor to stop, when motor starts again, also can, because of the relation of starting torque, cause motor again to start.Therefore,, if after cannot starter motor, motor driving module still continues when providing pulse width modulation (PWM) to control signal to motor, except increasing consumption power, also likely to cause motor to burn.The problem that cannot start in order to solve said motor, the present invention then provides a kind of circuit that configures Fast starting in motor driving module.
When motor driving module of the present invention is used when without microcontroller pattern, except reaching the function of adjusting output pulse width modulation (PWM) control signal according to product demand, the present invention can also further configure the circuit that a breech lock is forced starting in motor driving module, please refer to shown in Fig. 6.As previously mentioned, motor driving module of the present invention is formed on by a motor drive 10, one circuit 20 (being that resistance is to R1/R2) and the frequency regulating circuit 30 that motor drive 10 external voltages adjust and is formed; Wherein motor drive 10 comprises: a comparator 11, its first input end and resistance are connected in series R1/R2, its second input is connected with a triangular wave generator 13, through comparator 11, compare after two input voltages, comparator 11 is by an output output pulse width modulation (PWM) output voltage signal C
outto output unit 200, with CD-ROM drive motor 300, rotate.Then, breech lock of the present invention forces starting device to comprise a comparator 11, and its first input end is connected with switch sw1, and its second input is connected with a triangular wave generator 13; A breech lock is forced starter 19, and its first input end is connected with a pulse generator 18, and its another input is connected with an oscillator 16, and its output is connected with switch sw1, as shown in Figure 6.
Then, refer again to Fig. 7 and Fig. 8, wherein Fig. 7 is the function block schematic diagram that breech lock is forced starting device; And Fig. 8 is the signal schematic diagram that corresponding breech lock is forced starting device.First, as shown in Figure 7, please work as motor 300 when normal rotation, the commutation voltage waveform signal (also referred to as Hall voltage) that Hall element (HALL SENSOR) 310 can rotate motor 300 is exported normally, by Hall voltage signal, make pulse generator 18 produce a pulse wave signal, pulse wave signal suppresses (RESET) by the formed rolling counters forward of oscillator 16 thus; Wherein, the position that pulse generator 18 produces pulse wave signal is in Hall voltage signal commutation part, as shown in Figure 8.In other words, when motor 300 is during in normal rotation, just can be suppressed by the formed rolling counters forward of oscillator 16, now, breech lock is forced the low-voltage signal of starter 19 meeting output potential signals (RD), therefore the switch sw1, being connected with comparator 11 first input ends can not be switched on yet; For example: current potential signal (RD) is delivered to the gate terminal of semiconductor element (NMOS), made semiconductor element (NMOS) be closed (off); Make comparator 11 first input ends maintain the current potential of voltage level (VRS), also make the output of comparator 11 can export constantly a PWM output voltage signal C
outto output unit 200, with CD-ROM drive motor 300, rotate.
When if motor shuts down; For example: the current potential of the voltage level (VRS) providing when motor drive 10 cannot overcome the moment (torque) of motor 300 startings; Or motor 300 is after normal starting, because external force causes motor 300 to be lockable, stops operating etc.; Because Hall element 310 cannot normally be exported Hall voltage waveform signal, make pulse generator 18 also cannot normally export pulse wave signal, therefore, inhibition signal by oscillator 16 formed counters just can disappear, this hour counter can start counting, as the motor in Fig. 8 pins (motor-lock) region.Once surpass after first default time when time of rolling counters forward; For example: the time of counting was over 0.5 second; This stall of interval scale motor is moving, and breech lock forces starter 19 can send the high potential signal of a current potential signal (RD) to the input of switch sw1; For example: current potential signal (RD) is delivered to the gate terminal of semiconductor element (NMOS), semiconductor element (NMOS) is switched on; The conducting that sees through switch sw1 can be reduced to the low-potential state of earth point (being GND point) by voltage level (VRS) voltage; Clearly, the comparator 11 of this time time can output pulse width modulation (PWM) output voltage signal C
outto output unit 200.
When breech lock forces starter 19 to send a high potential signal (RD) to the input of switch sw1, by the formed counter of oscillator 16, still continue counting, when the time of rolling counters forward, surpass after second default time; For example: the 5-10 that the second default time was set as to the first default time time doubly; Breech lock forces starter 19 to send an electronegative potential signal (RD) to the input of switch sw1, makes switch sw1 be closed (off), as the release in Fig. 8 (lock-release) region.Now, comparator 11 first input ends can return to the current potential of voltage level (VRS), also make the output of comparator 11 can export constantly a pulse width modulation (PWM) output voltage signal C
outto output unit 200, with CD-ROM drive motor 300, rotate.At this, will emphasize, an object of the setting of second default time is after will confirming that motor has stopped, then voltage level (VRS) voltage being provided with outside voltage-regulating circuit 20 comes again CD-ROM drive motor 300 to rotate.
Follow again, the invention provides another and can adjust the starting voltage circuit in breech lock pressure starting device.Again as shown in Figure 6, the external voltage Circuit tuning 20 being connected with motor drive 10, resistance-capacitance (RC) charging circuit that it is comprised of the resistance R 1 connecting, R2 and capacitor C 1, wherein capacitor C 1 can be by a plurality of electric capacity institute group, and this resistance-capacitance (RC) charging circuit can be via the charge constant (RCtime constant) that the size of resistance or electric capacity is decided to voltage level (VRS) voltage.When motor 300 is lockable, breech lock forces starter 19 can send a high potential signal (RD) to the input of switch sw1, makes the conducting of switch sw1 that voltage level (VRS) voltage can be reduced to the low-potential state of earth point (being GND point); Now, externally between voltage-regulating circuit 20 and comparator 11 first input ends, form a discharge loop, make capacitor C 1 can be discharged to earthing potential.When breech lock, force starter 19 and send a low-potential signal (RD) to the input of switch sw1, make switch sw1 be closed (off), now, comparator 11 first input ends can restart to charge to the current potential of voltage level (VRS).
The charge constant of the RC charging circuit forming when external voltage Circuit tuning 20 too hour, RC charging circuit can just charge to voltage level (VRS) voltage very soon, in the time of may causing the latched pressure starter 19 of motor 300 to reset, produce vibration (vibration) or noise (noise); And this vibration or noise for some compared with for accurate device, need to avoid; Such as: Blu-ray Disc player etc.; Therefore, resistance-capacitance (RC) charging circuit that can select resistance R 1, R2 and the C1 of external voltage Circuit tuning 20 to form, make it have the charge constant of longer voltage level (VRS) voltage, now, in the time of can reducing motor 300 and again driven, the vibration producing or noise.Clearly, the motor driving module 10 of signal is controlled in adjusting output pulse width modulation of the present invention (PWM), can adjust according to different application demands the time constant of its charging.After being charged to set definite value, voltage level (VRS) will remain certain, so that motor 300 is driven and reach the tachometer value of previous setting, until next motor is when be lockable again, whom just understands and repeat above action, the schematic diagram of signal and charging voltage waveform is controlled in the pulse width modulation (PWM) that please refer to Fig. 9.
Explanation for preferred embodiment of the present invention is the object for illustrating above, and is not intended to limit accurate application form of the present invention, by above instruction or to be learnt and revised to a certain degree by embodiments of the invention be possible.Therefore, technological thought of the present invention decides the claim by following and equalization thereof.
Claims (10)
1. the motor driving module of an adjusting output pulse width modulation control signal, it is characterized in that, this motor driving module forces starting device, to be formed at this breech lock by a breech lock to force voltage-regulating circuit and a frequency regulating circuit of starting device outside to be formed, being characterized as of this motor driving module:
This breech lock forces starting device to comprise:
One comparator, it has a first input end and one second input, and this first input end is connected with this external voltage Circuit tuning and a switch;
One triangular wave generator, its output is connected with the second input of this comparator, and its input is connected with this frequency regulating circuit, in order to export the triangular wave signal of an adjustable frequency to the second input of this comparator; And
A breech lock is forced starter, and its first input end is connected with a pulse generator, and its another input is connected with an oscillator, and its output is connected with this switch;
The pulse wave signal producing by this pulse generator and this oscillator count up to a setting-up time and control this breech lock and force starter to export a signal to control this switch, to control the output signal of this comparator.
2. the motor driving module of adjusting output pulse width modulation control signal according to claim 1, is characterized in that, this switch is semiconductor element.
3. the motor driving module of adjusting output pulse width modulation control signal according to claim 1 and 2, is characterized in that, it is a chip that this breech lock is forced starting device.
4. the motor driving module of adjusting output pulse width modulation control signal according to claim 1, is characterized in that, this external voltage Circuit tuning is by least one resistance and the formed charging circuit of at least one electric capacity.
5. the motor control system of an adjusting output pulse width modulation control signal, it is characterized in that, it is the motor driving module by an adjusting output pulse width modulation control signal, one output unit being connected with this motor driving module and a motor being connected with this output unit, and this motor driving module is by a motor drive, one external voltage Circuit tuning and a formed frequency regulating circuit of capacitor form, wherein, being characterized as of this motor driving module: motor drive comprises a comparator, it has a first input end and one second input, and this first input end is connected with this external voltage Circuit tuning and a switch,
One triangular wave generator, its output is connected with the second input of this comparator, and its input is connected with this frequency regulating circuit, in order to export the triangular wave signal of an adjustable frequency to the second input of this comparator; And
One breech lock is forced starter, and its first input end is connected with a pulse generator, and its another input is connected with an oscillator, and its output is connected with this switch;
The pulse wave signal producing by this pulse generator and this oscillator count up to a setting-up time and control this breech lock and force starter to export a signal to control this switch, to control the output signal of this comparator;
And export a pulse width modulation while controlling signal by the output of this comparator, this pulse width modulation is controlled to signal and deliver to this output unit, to drive this revolution.
6. the motor control system of adjusting output pulse width modulation control signal according to claim 5, is characterized in that, this switch is semiconductor element.
7. according to the motor control system of the adjusting output pulse width modulation control signal described in claim 5 or 6, it is characterized in that, this motor drive is a chip.
8. the motor control system of adjusting output pulse width modulation control signal according to claim 5, is characterized in that, this external voltage Circuit tuning is by least one resistance and the formed charging circuit of at least one electric capacity.
9. the motor control system of adjusting output pulse width modulation control signal according to claim 5, is characterized in that, this motor is a single-phase motor.
10. the motor control system of adjusting output pulse width modulation control signal according to claim 5, is characterized in that, this motor is a three-phase motor.
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