Waveform rectification comparator, Hall motor and ripple motor

Abstract

The utility model provides a waveform rectification comparator, a Hall motor and a ripple motor, and relates to the technical field of motors, the waveform rectification comparator comprises an operational amplifier, the reverse input end of the operational amplifier is connected with the waveform input end of the rectification comparator and power supply voltage through a first voltage division circuit; the positive input end of the operational amplifier is connected with the power supply voltage through the second voltage division circuit, the output end of the operational amplifier serves as the output end of the rectification comparator, and the power supply end of the operational amplifier is connected with the power supply; and the voltage limiting circuit is connected with the reverse input end of the operational amplifier. The beneficial effects are that square waves / ripples output by the Hall motor / ripple motor are rectified and converted into standard square waves, so that the standard square waves form standard square wave signals to be identified by a single-chip microcomputer.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially relates to a waveform rectification comparator, hall motor and ripple motor. BACKGROUND

[0002] In recent years, the automobile industry is booming, and new energy vehicles have significantly improved in comfort adjustment function compared to traditional fuel vehicles, such as 12-way adjustment of seats, adjustable leg rest position, and expandable small table board. The automation control of these functions mostly relies on motors, and new energy vehicles need to monitor the number of motor rotations in real time and detect the Hall sensor signal or current ripple of the motor with higher precision standards in order to improve ride comfort and have specific and strict requirements for motor speed and adjustment angle.

[0003] However, the square wave signal generated by the Hall motor or the processed voltage sine wave (which is converted by the current ripple of the ripple motor through the direct current blocking and alternating current passing circuit) is often affected by power fluctuations or inherent instability factors, making it difficult for the PWM (pulse width modulation) sampling port of the single-chip microcomputer to accurately capture each signal wave, and signal wave loss may occur. Especially when the motor uses PWM speed regulation, this problem becomes more prominent, ultimately leading to the actual movement position of the motor not accurately matching the expected position. SUMMARY

[0004] To solve the problems in the prior art, the utility model provides a waveform rectification comparator, comprising:

[0005] An operational amplifier, the reverse input end of the operational amplifier is connected to the waveform input end of the rectification comparator and the power supply voltage through a first voltage dividing circuit, the positive input end of the operational amplifier is connected to the power supply voltage through a second voltage dividing circuit, the output end of the operational amplifier serves as the output end of the rectification comparator, and the power supply end of the operational amplifier is connected to a power supply;

[0006] A voltage limiting circuit connected to the reverse input end of the operational amplifier.

[0007] Preferably, the first voltage dividing circuit comprises:

[0008] A first resistor, one end of the first resistor is connected to one end of a second resistor and the reverse input end of the operational amplifier, the other end of the first resistor is connected to the waveform input end, and the other end of the second resistor is grounded;

[0009] A third resistor, one end of the third resistor is connected to the other end of the first resistor, and one end of the third resistor is connected to the power supply voltage.

[0010] Preferably, the second voltage dividing circuit comprises:

[0011] a fourth resistor, one end of the fourth resistor is connected to the positive input end of the operational amplifier and one end of a fifth resistor, the other end of the fifth resistor is grounded, and the other end of the fourth resistor is connected to the power supply voltage;

[0012] a sixth resistor, one end of the sixth resistor is connected to one end of the fifth resistor, and the other end of the sixth resistor is connected to the output end of the operational amplifier, and one end of the sixth resistor is also connected to the negative electrode of a first diode, and the negative electrode of the first diode is grounded.

[0013] Preferably, a power supply filtering circuit is further included and connected between the power supply and the power supply end of the operational amplifier.

[0014] The power supply filtering circuit comprises a first capacitor and a second capacitor, one end of the first capacitor and one end of the second capacitor are connected to the power supply voltage and the power supply end of the operational amplifier, and the other end of the first capacitor and the other end of the second capacitor are grounded.

[0015] Preferably, an output filtering circuit is further included and connected to the output end of the operational amplifier.

[0016] The output filtering circuit comprises:

[0017] a third capacitor, one end of the third capacitor is connected to the output end of the operational amplifier, and the other end of the third capacitor is grounded.

[0018] a seventh resistor, one end of the seventh resistor is connected to the output end of the operational amplifier, and the other end of the seventh resistor is connected to one end of a fourth capacitor as the output end of the rectifier comparator, and the other end of the fourth capacitor is grounded.

[0019] Preferably, a motor filtering circuit is further included and connected to the waveform input end of the rectifier comparator.

[0020] The motor filtering circuit is a fifth capacitor, one end of the fifth capacitor is connected to the waveform input end of the hall motor, and the other end of the fifth capacitor is grounded.

[0021] Preferably, the voltage limiting circuit is a zener diode, the negative electrode of the zener diode is connected to the negative input end of the operational amplifier, and the positive electrode of the zener diode is grounded.

[0022] Preferably, the waveform input end of the waveform rectifier comparator is connected to a square wave or a ripple.

[0023] The utility model also provides a kind of Hall motor, waveform rectification is carried out using the waveform rectification comparator as described above, the square wave of the Hall motor output is connected to the waveform input end of the waveform rectification comparator, and the output end of the waveform rectification comparator outputs standard square wave.

[0024] The utility model also provides a kind of ripple motor, waveform rectification is carried out using the waveform rectification comparator as described above, the ripple of the ripple motor output is connected to the waveform input end of the waveform rectification comparator, and the output end of the waveform rectification comparator outputs standard square wave.

[0025] The above technical solution has the following advantages or beneficial effects: the square wave / ripple output by the Hall motor / ripple motor is compared with the set reference voltage by the operational amplifier, and the corresponding signal is output according to the comparison result. This process realizes the rectification and conversion of the square wave / ripple output by the Hall motor / ripple motor into standard square wave, so that it forms a standard square wave signal for single-chip microcomputer recognition. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 For the preferred embodiment of the utility model, a circuit diagram of a waveform rectification comparator. DETAILED DESCRIPTION

[0027] The utility model will be described in detail in combination with the drawings and specific embodiments. The utility model is not limited to this embodiment, as long as it conforms to the spirit of the utility model, other embodiments can also belong to the scope of the utility model.

[0028] In the preferred embodiment of the utility model, based on the above problems existing in the prior art, a waveform rectification comparator is provided, as shown in Figure 1 It includes:

[0029] Operational amplifier U1, the reverse input end IN- of operational amplifier U1 is connected to the waveform input end R_HALL_VS+ of waveform rectification comparator and power voltage VBAT1_SW through first voltage dividing circuit 1, the positive input end IN+ of operational amplifier U1 is connected to power voltage VBAT1_SW through second voltage dividing circuit 2, the output end OUT of operational amplifier U1 is used as the output end H_Sensor_R of rectification comparator, and the power supply end of operational amplifier U1 is connected to power supply VCC_5V_SW;

[0030] Voltage limiting circuit 3 is connected to the reverse input end IN- of operational amplifier U1.

[0031] Specifically, in the embodiment, the rectifier comparator mainly consists of an operational amplifier, a voltage dividing circuit, a voltage limiting circuit and the like. The operational amplifier is a core device, the reverse input end of which is connected with the waveform input end of the waveform rectifier comparator and a power supply voltage through a first voltage dividing circuit, and the forward input end of which is connected with the power supply voltage through a second voltage dividing circuit. In this way, the operational amplifier can output a corresponding signal according to the comparison result of the input voltage and the reference voltage (set by the second voltage dividing circuit 2).

[0032] In the embodiment, the operational amplifier compares the ripple / square wave received by the waveform input end with the set reference voltage. When the voltage of the ripple / square wave is higher than the reference voltage (0.211*VM>0.176*VBAT1_SW), the operational amplifier outputs a low level (such as 0V); when the voltage of the ripple / square wave is lower than the reference voltage (0.211*VM<0.176*VBAT1_SW), the operational amplifier outputs a high level (such as 5V). This process realizes rectification and conversion of the ripple / square wave into a standard 0V / 5V square wave, so as to form a standard square wave signal for recognition by a single-chip microcomputer.

[0033] Since the R_HALL_VS+ port is an external port of the waveform rectifier comparator, it may be interfered by high-energy signals (such as ESD, etc.) from the outside, and the voltage limiting circuit is used to limit the introduced high voltage of the port to below 5.1V, so as to prevent damage to the operational amplifier circuit elements caused by excessively high voltage.

[0034] In the preferred embodiment of the utility model, as shown in Figure 1 The first voltage dividing circuit 1 comprises:

[0035] A first resistor R1, one end of the first resistor R1 is connected with one end of a second resistor R2 and a reverse input end of an operational amplifier U1, and the other end of the first resistor R1 is connected with a waveform input end, and the other end of the second resistor R2 is grounded;

[0036] A third resistor R3, one end of the third resistor R3 is connected with the other end of the first resistor R1, and the other end of the third resistor R3 is connected with a power supply voltage VCC_5V_SW.

[0037] Specifically, in the embodiment, the hall square wave voltage generated by the hall motor is input to the port R_HALL_VS+ (the voltage is set as VM here), and is divided by the first resistor R1 and the second resistor R2, so that the voltage input to the reverse input end IN- of the operational amplifier U1 is 0.211*VM.

[0038] In the preferred embodiment of the utility model, as shown in Figure 1 The second voltage dividing circuit 2 comprises:

[0039] The fourth resistor R4 has one end connected to the positive input end of the operational amplifier U1 and one end of the fifth resistor R5, the other end of the fifth resistor R5 is grounded, and the other end of the fourth resistor R4 is connected to the power supply voltage VCC_5V_SW;

[0040] The sixth resistor R6 has one end connected to one end of the fifth resistor R5 and the negative electrode of the first diode D1, and the other end of the sixth resistor R6 is connected to the output end OUT of the operational amplifier U1 and the ground.

[0041] Specifically, in the embodiment, the reference voltage at the positive input end IN+ of the operational amplifier U1 is set, and the reference voltage is obtained by voltage division of the power supply voltage VBAT1_SW through the fourth resistor R4 and the fifth resistor R5, and is usually set to the intermediate value between the maximum level and the minimum level of the ripple / square wave generated by the motor (0.176*VBAT1_SW in the embodiment). The reference voltage changes with the fluctuation of the power supply voltage VBAT1_SW, and can offset the fluctuation caused by the change of the power supply voltage when the motor outputs the ripple / square wave. The values of the fourth resistor R4 and the fifth resistor R5 can be adjusted to obtain a reference voltage value of other values to ensure that the value is in the middle position between the maximum level and the minimum level of the ripple / square wave generated by the motor. To ensure that each motor ripple / square wave is accurately converted into a standard square wave.

[0042] At the same time, since the reference voltage of the rectifier comparator is determined by the power supply voltage, it can be applied to various power supply voltage environments.

[0043] In a preferred embodiment of the utility model, still include power supply filter circuit 4, be connected between power supply power supply VCC 5V SW and the power supply end V+ of operational amplifier U1, as Figure 1 As shown in the figure, the power supply filter circuit 4 includes a first capacitor C1 and a second capacitor C2, one end of the first capacitor C1 and one end of the second capacitor C2 are connected to the power supply voltage VCC_5V_SW and the power supply end V+ of the operational amplifier U1, and the other end of the first capacitor C1 and the other end of the second capacitor C2 are grounded.

[0044] Specifically, in the embodiment, the first capacitor C1 and the second capacitor C2 in the power supply filter circuit 4 are used to filter noise and clutter for the power supply of the operational amplifier element.

[0045] In a preferred embodiment of the utility model, still include output filter circuit 5, connect the output end OUT of operational amplifier U1, as Figure 1 As shown in the figure, the output filter circuit 5 includes:

[0046] The third capacitor C3 has one end connected to the output end OUT of the operational amplifier U1 and the other end grounded.

[0047] The seventh resistor R7 has one end connected to the output end of the operational amplifier U1, and the other end connected to one end of the fourth capacitor C4 as the output end H_Sensor_R of the rectifier comparator, and the other end of the fourth capacitor C4 is grounded.

[0048] Specifically, in the embodiment, the third capacitor C3 and the fourth capacitor C4 in the output filter circuit 5 are used to filter the burr on the square wave output by the operational amplifier U1.

[0049] In the preferred embodiment of the utility model, as shown in the figure, Figure 1 The motor filter circuit 6 is a fifth capacitor C5, one end of the fifth capacitor C5 is connected to the waveform input end R_HALL_VS+ of the waveform rectifier comparator, and the other end of the fifth capacitor C5 is grounded.

[0050] Specifically, in the embodiment, the fifth capacitor C5 is used to filter high-frequency noise of the received ripple / square wave signal.

[0051] In the preferred embodiment of the utility model, as shown in the figure, Figure 1 The voltage limiting circuit 3 is a stabilizing diode D2, the negative electrode of the stabilizing diode D2 is connected to the reverse input end IN- of the operational amplifier U1, and the positive electrode of the stabilizing diode D2 is grounded.

[0052] Specifically, in the embodiment, since the waveform input end R_HALL_VS+ port is an external port of the waveform rectifier, it may be interfered by external high-energy signals (such as ESD, etc.), and the stabilizing diode D2 is used to limit the introduced high voltage of the port to below 5.1V, so as to prevent the operational amplifier circuit element from being damaged by excessively high voltage.

[0053] The utility model also provides a kind of Hall motor, waveform rectification is carried out using the waveform rectifier comparator as described above, and the square wave output by the Hall motor is connected to the waveform input end of the waveform rectifier comparator, and the output end of the waveform rectifier comparator outputs standard square wave.

[0054] The utility model also provides a kind of ripple motor, waveform rectification is carried out using the waveform rectifier comparator as described above, and the ripple output by the ripple motor is connected to the waveform input end of the waveform rectifier comparator, and the output end of the waveform rectifier comparator outputs standard square wave.It needs to be noted that the ripple signal input to the waveform rectifier comparator by the ripple motor is the ripple of AC signal after being filtered by the through AC circuit, and is not the ripple signal directly generated by the ripple motor.

[0055] The above merely describes the preferred embodiments of the present application, and is not intended to limit the implementation and protection scope of the present application. For those skilled in the art, it should be understood that any equivalent changes and obvious variations made according to the content of the present application and drawings should be included in the protection scope of the present application.

Claims

1. A waveform rectifier comparator characterized by, The waveform rectifier comparator comprises: an operational amplifier, a reverse input end of the operational amplifier is connected with a waveform input end of the rectifier comparator and a power supply voltage through a first voltage dividing circuit, a forward input end of the operational amplifier is connected with the power supply voltage through a second voltage dividing circuit, an output end of the operational amplifier is used as an output end of the rectifier comparator, and a power supply end of the operational amplifier is connected with a power supply; a voltage limiting circuit connected with the reverse input end of the operational amplifier.

2. The waveform rectifier comparator of claim 1, wherein, The first voltage dividing circuit comprises: a first resistor, one end of the first resistor is connected with one end of a second resistor and the reverse input end of the operational amplifier, the other end of the first resistor is connected with the waveform input end, and the other end of the second resistor is grounded; a third resistor, one end of the third resistor is connected with the other end of the first resistor, and the other end of the third resistor is connected with the power supply voltage.

3. The waveform rectifier comparator of claim 1, wherein, The second voltage dividing circuit comprises: a fourth resistor, one end of the fourth resistor is connected with the forward input end of the operational amplifier and one end of a fifth resistor, the other end of the fifth resistor is grounded, and the other end of the fourth resistor is connected with the power supply voltage; a sixth resistor, one end of the sixth resistor is connected with one end of the fifth resistor, the other end of the sixth resistor is connected with the output end of the operational amplifier, and one end of the sixth resistor is also connected with a negative electrode of a first diode, and the negative electrode of the first diode is grounded.

4. The waveform rectifier comparator of claim 1, wherein, A power supply filtering circuit is further connected between the power supply and the power supply end of the operational amplifier; The power supply filtering circuit comprises a first capacitor and a second capacitor, one end of the first capacitor and one end of the second capacitor are connected with the power supply voltage and the power supply end of the operational amplifier, and the other end of the first capacitor and the other end of the second capacitor are grounded.

5. The waveform rectifier comparator of claim 1, wherein, An output filtering circuit is further connected with the output end of the operational amplifier; The output filtering circuit comprises: a third capacitor, one end of the third capacitor is connected with the output end of the operational amplifier, and the other end of the third capacitor is grounded; a seventh resistor, one end of the seventh resistor is connected with the output end of the operational amplifier, the other end of the seventh resistor is connected with one end of a fourth capacitor as the output end of the rectifier comparator, and the other end of the fourth capacitor is grounded.

6. The waveform rectifier comparator of claim 1, wherein, A motor filtering circuit is further connected with the waveform input end of the rectifier comparator; The motor filtering circuit is a fifth capacitor, one end of the fifth capacitor is connected with the waveform input end of a hall motor, and the other end of the fifth capacitor is grounded.

7. The waveform rectifier comparator of claim 1, wherein, The voltage limiting circuit is a voltage stabilizing diode, a negative electrode of the voltage stabilizing diode is connected with the reverse input end of the operational amplifier, and a positive electrode of the voltage stabilizing diode is grounded.

8. The waveform rectifier comparator of claim 1, wherein, The waveform input end of the waveform rectifier comparator is connected with a square wave or a ripple.

9. A Hall motor, characterized by The waveform rectifier comparator according to any one of claims 1-8 is used for waveform rectification, a square wave output by a hall motor is connected with the waveform input end of the waveform rectifier comparator, and a standard square wave is output from the output end of the waveform rectifier comparator.

10. A ripple motor characterized by, The waveform rectifier comparator as claimed in any one of claims 1-8 is used for waveform rectification, the waveform input end of the waveform rectifier comparator is connected with the ripple output of the motor, and the output end of the waveform rectifier comparator outputs a standard square wave.

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