CN204886754U - Sinusoidal wave current drive's single coil DC Brushless motor drive integrated circuit - Google Patents
Sinusoidal wave current drive's single coil DC Brushless motor drive integrated circuit Download PDFInfo
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- CN204886754U CN204886754U CN201520561722.4U CN201520561722U CN204886754U CN 204886754 U CN204886754 U CN 204886754U CN 201520561722 U CN201520561722 U CN 201520561722U CN 204886754 U CN204886754 U CN 204886754U
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Abstract
The utility model discloses a sinusoidal wave current drive's single coil DC Brushless motor drive integrated circuit, produce unit, the enlarged comparing element of self -adaptation and output unit including hall voltage. The utility model discloses a PWM voltage output wave form comes the drive coil, utilizes the impedance of coil self, filters the radio -frequency component, and the operating current that flows through the fan coil is the sinusoidal waveform, has reduced the noise the when coil switches by a wide margin. In the noise reduction to do not increase the consumption of chip, guaranteed the reliability of system.
Description
Technical field
The utility model relates to the unicoil driven by Brush-Less DC motor integrated circuit that a kind of sine-wave current drives.
Background technology
Time the complementary output signal generation voltage status of unicoil DC brushless motor two of being in operation when driving chip switches, due to the inductance characteristic of motor coil, electric current cannot change instantaneously, and the voltage waveform of output can be caused to produce pulse spike.In the process switched, there is high fdrequency component in electric current, the high fdrequency component be in audiorange can produce the noise that people's ear can be heard.For the application having quiet requirement, then must adding filter capacitor at the two ends of coil, alleviating switching time by increasing.This method can cause the cost of overall plan to increase, and also reduces the efficiency of motor.
Cost is not increased, technology that engineers develops " Sofe Switch " while reducing noise.By designing at the H bridge of driving chip inside the rise and fall time that suitable circuit arrangement improves output voltage waveforms, noise when reducing fan turns with this.This method eliminates two filter capacitors, reduces cost, but chip can be caused to bear larger power consumption when output state switches, and is unfavorable for improving reliability, and the method with add the same of filter capacitor and can cause negative effect to the efficiency of motor.
Utility model content
The purpose of this utility model is to provide the unicoil driven by Brush-Less DC motor integrated circuit that a kind of sine-wave current drives, to solve large, the inefficient problem of existing unicoil Brushless DC Motor Drive Circuit current noise.
For solving the problems of the technologies described above, the unicoil driven by Brush-Less DC motor integrated circuit that the utility model provides a kind of sine-wave current to drive, comprises Hall voltage generation unit, self adaptation amplifies comparing unit and output unit.
Wherein, self adaptation amplification comparing unit comprises the fully-differential amplifier be connected with Hall voltage generation unit, the buffer be connected with the output of fully-differential amplifier, the first comparator be connected with the output of buffer respectively and the second comparator; The positive input terminal of the second comparator is connected with buffer for the self adaptation amplitude adjuster of the multiplication factor of fully-differential amplifier described in Automatic adjusument by one, and its negative input end is connected with a triangular signal generation unit; The negative input end of the first comparator is connected to the output of buffer, and its positive input terminal is connected with a reference level; The output of the first comparator and the output of the second comparator are all connected to predrive circuit.
Further, Hall voltage generation unit comprises a voltage-stabiliser tube, and the Hall element be connected with the output of voltage-stabiliser tube.
Further, output unit is the H-bridge circuit that an output signal switches between low level and PWM waveform.
Further, the frequency of the triangular signal of described triangular signal generation unit generation is higher than audio frequency.
The beneficial effects of the utility model are:
1, the utility model is by being undertaken after amplification and triangular signal compares generation PWM modulation signal by hall sensing voltage.By the output of pwm signal control H bridge.Because triangular signal frequency is higher than audio frequency, the high frequency noise produced because of modulation can not be heard by people's ear.
2, a self adaptation amplitude adjuster is provided with at the positive input terminal of the second comparator, the output amplitude of amplifier can be made to carry out self adaptation amplification according to external magnetic field environment, guarantee that the amplitude of amplifying rear output signal is identical with triangular wave amplitude, guarantee that the rate of change of the PWM waveform duty cycle that comparator exports remains at suitable level with this.
The utility model adopts PWM output voltage wave to carry out drive coil, and utilize the impedance of coil self, filter high-frequency composition, the operating current flowing through fan loop is sinusoidal waveform, significantly reduces noise when coil switches.While reduction noise, do not increase the power consumption of chip, ensure that the reliability of system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model most preferred embodiment.
Fig. 2 is traditional unicoil fan output voltage wave schematic diagram;
Fig. 3 is output voltage wave schematic diagram of the present utility model;
Fig. 4 is traditional unicoil fan coil current waveform schematic diagram;
Fig. 5 is coil current waveform schematic diagram of the present utility model.
Embodiment
Below embodiment of the present utility model is described; so that those skilled in the art understand the utility model; but should be clear; the utility model is not limited to the scope of embodiment; to those skilled in the art; as long as various change to limit and in the spirit and scope of the present utility model determined, these changes are apparent, and all innovation and creation utilizing the utility model to conceive are all at the row of protection in appended claim.
The unicoil driven by Brush-Less DC motor integrated circuit that sine-wave current as shown in Figure 1 drives, comprises Hall voltage generation unit, self adaptation amplifies comparing unit and output unit.
Wherein, Hall voltage generation unit comprises a voltage-stabiliser tube, the Hall element be connected with the output of voltage-stabiliser tube; Output unit is a H-bridge circuit.Voltage-stabiliser tube is used for supply voltage being changed into stable voltage, for internal circuit blocks is powered.Hall element, for responding to extraneous magnetic field, produces Hall voltage.
Self adaptation is amplified comparing unit and is comprised the fully-differential amplifier be connected with Hall voltage generation unit, and fully-differential amplifier is for amplifying above-mentioned hall signal, and signal of checking the mark transfers single-ended signal to sends into the first comparator and reference level compares.The output of fully-differential amplifier is connected with a buffer, and the output of buffer is connected to the negative input end of the first comparator and the positive input terminal of the second comparator respectively; A self adaptation amplitude adjuster is also provided with between buffer and the second comparator.Be connected with a triangular signal generation unit at the negative input end of the second comparator, triangular signal generation unit comprises an oscillator and triangular signal produces circuit.Wherein, the frequency of the triangular signal of triangular signal generation unit is higher than audio signal (namely higher than 20000Hz).
Above-mentioned self adaptation amplitude adjuster can make the output amplitude of amplifier carry out self adaptation amplification according to external magnetic field environment, guarantee that the amplitude of amplifying rear output signal is identical with triangular wave amplitude, dissimilar motor is adapted to this, regardless of the magnitude of field intensity of the magnetic stripe of motor, the change in duty cycle rate of pwm signal can maintain suitable level all the time.
The output signal of the first comparator and the second comparator controls the output of H-bridge circuit by predrive circuit.H bridge exports the coil in PWM modulation signal drive motors, utilizes the impedance of coil self can filter high-frequency composition, realizes coil midstream and crosses sine-wave current.
When this utility model is unloaded, OUT1 and the OUT2 signal that H-bridge circuit exports as shown in Figure 3.OUT1 and OUT2 output signal switches between low level and PWM waveform.
When machine operation, due to the impedance operator of coil self, by radio-frequency component filtering, sine-wave current as shown in Figure 5 can be produced.The noise that the generation of sine-wave current will significantly reduce motor and produces when signal switching.
The employing PWM output voltage wave of this utility model novelty carrys out drive coil, utilizes the impedance of coil self, filter high-frequency composition, and the operating current flowing through fan loop is sinusoidal waveform, significantly reduces noise when coil switches.While reduction noise, do not increase the power consumption of chip, ensure that the reliability of system.
Claims (4)
1. a unicoil driven by Brush-Less DC motor integrated circuit for sine-wave current driving, is characterized in that, comprises Hall voltage generation unit, self adaptation amplifies comparing unit and output unit;
Described self adaptation is amplified comparing unit and is comprised the fully-differential amplifier be connected with described Hall voltage generation unit, the buffer be connected with the output of described fully-differential amplifier, the first comparator be connected with the output of described buffer respectively and the second comparator; The positive input terminal of described second comparator is connected with buffer for the self adaptation amplitude adjuster of the multiplication factor of fully-differential amplifier described in Automatic adjusument by one, and its negative input end is connected with a triangular signal generation unit; The negative input end of described first comparator is connected to the output of buffer, and its positive input terminal is connected with a reference level; The output of described first comparator and the output of the second comparator are all connected to predrive circuit.
2. the unicoil driven by Brush-Less DC motor integrated circuit of sine-wave current driving according to claim 1, it is characterized in that, described Hall voltage generation unit comprises a voltage-stabiliser tube, and the Hall element be connected with the output of described voltage-stabiliser tube.
3. the unicoil driven by Brush-Less DC motor integrated circuit of sine-wave current driving according to claim 1, it is characterized in that, described output unit is the H-bridge circuit that an output signal switches between low level and PWM waveform.
4. the unicoil driven by Brush-Less DC motor integrated circuit of sine-wave current driving according to claim 1, is characterized in that, the frequency of the triangular signal that described triangular signal generation unit produces is higher than audio frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520561722.4U CN204886754U (en) | 2015-07-30 | 2015-07-30 | Sinusoidal wave current drive's single coil DC Brushless motor drive integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520561722.4U CN204886754U (en) | 2015-07-30 | 2015-07-30 | Sinusoidal wave current drive's single coil DC Brushless motor drive integrated circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204886754U true CN204886754U (en) | 2015-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520561722.4U Expired - Fee Related CN204886754U (en) | 2015-07-30 | 2015-07-30 | Sinusoidal wave current drive's single coil DC Brushless motor drive integrated circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204886754U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993744A (en) * | 2015-07-30 | 2015-10-21 | 成都芯进电子有限公司 | Single-coil direct-current brushless motor driving integrated circuit driven by sine wave current |
| CN108832599A (en) * | 2018-06-20 | 2018-11-16 | 上海金脉电子科技有限公司 | Unicoil brushless DC motor control system and control method |
| CN109075756A (en) * | 2016-03-31 | 2018-12-21 | 日本电信电话株式会社 | Driving circuit and optical transmitting set |
| CN114050746A (en) * | 2021-11-11 | 2022-02-15 | 成都芯进电子有限公司 | Gain control system and method for single-phase sine wave DC brushless motor driving chip |
-
2015
- 2015-07-30 CN CN201520561722.4U patent/CN204886754U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993744A (en) * | 2015-07-30 | 2015-10-21 | 成都芯进电子有限公司 | Single-coil direct-current brushless motor driving integrated circuit driven by sine wave current |
| CN104993744B (en) * | 2015-07-30 | 2018-04-13 | 成都芯进电子有限公司 | The unicoil driven by Brush-Less DC motor integrated circuit of sine-wave current driving |
| CN109075756A (en) * | 2016-03-31 | 2018-12-21 | 日本电信电话株式会社 | Driving circuit and optical transmitting set |
| CN109075756B (en) * | 2016-03-31 | 2022-06-07 | 日本电信电话株式会社 | Drive circuit and light emitter |
| CN108832599A (en) * | 2018-06-20 | 2018-11-16 | 上海金脉电子科技有限公司 | Unicoil brushless DC motor control system and control method |
| CN108832599B (en) * | 2018-06-20 | 2020-07-14 | 上海金脉电子科技有限公司 | Control system and control method for single-coil brushless direct current motor |
| CN114050746A (en) * | 2021-11-11 | 2022-02-15 | 成都芯进电子有限公司 | Gain control system and method for single-phase sine wave DC brushless motor driving chip |
| CN114050746B (en) * | 2021-11-11 | 2024-02-02 | 成都芯进电子有限公司 | Gain control system and method for single-phase sine wave DC brushless motor driving chip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20190730 |