CN218767095U - Non-inductive three-phase motor drive zero-crossing detection circuit - Google Patents
Non-inductive three-phase motor drive zero-crossing detection circuit Download PDFInfo
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- CN218767095U CN218767095U CN202222831393.3U CN202222831393U CN218767095U CN 218767095 U CN218767095 U CN 218767095U CN 202222831393 U CN202222831393 U CN 202222831393U CN 218767095 U CN218767095 U CN 218767095U
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Abstract
The utility model provides a no sense three-phase motor drive zero crossing detection circuitry, relates to the field, a no sense three-phase motor drive zero crossing detection circuitry, including first divider circuit, second divider circuit, third divider circuit, parallel circuit, first fortune is put circuit, second fortune is put circuit and third fortune and is put the circuit, the utility model discloses a first divider circuit, second divider circuit, third divide circuit to connect three-phase motor line, through first divider circuit, second divider circuit, third divider circuit, first fortune is put circuit, second fortune is put circuit and third fortune and is put the circuit and do resistance partial pressure and fortune and put and do the comparison back, output COMP-U, COMP-V, COMP-W3 zero crossing signal, through the alternating current signal that detects the three-phase, the utility model discloses a zero crossing signal detection circuitry is simple, manufacturing cost is lower.
Description
Technical Field
The application relates to the field of detection circuits, in particular to a non-inductive three-phase motor drive zero-crossing detection circuit.
Background
Motor control refers to control of starting, accelerating, running, decelerating, and stopping of a motor. Different requirements and purposes are provided according to different types of motors and use occasions of the motors. For the motor, the purposes of quick starting, quick response, high efficiency, high torque output and high overload capacity of the motor are achieved through motor control. In order to complete the control and operation of the various links, the control must be performed by means of an external circuit or device, and the external device needs to acquire real-time running data of the current and the voltage of the motor when performing the control, so that the motor can be efficiently and reliably controlled. Wherein the detection of the zero crossing point of the voltage and the current during the operation of the motor is an important reference parameter. There are currently two main approaches: firstly, through detecting the terminal voltage signal of the motor, the zero crossing point of the back electromotive force signal of the winding is indirectly obtained after comparison, and the method has the following defects: the PWM modulation wave in the terminal voltage needs to be filtered by a capacitor in a detection circuit, phase shift can be generated, the phase shift is changed along with the change of the rotating speed of the motor, the phase change is inaccurate, and especially when the system speed regulation range is wide, the phase shift of the motor is too large when the motor runs at high frequency, and correct phase change cannot be implemented; and secondly, the terminal voltage of the motor is sampled during the turn-off or turn-on period of PWM chopping, and the zero crossing point of the back electromotive force signal is directly obtained.
Disclosure of Invention
An object of the embodiments of the present application is to provide a non-inductive three-phase motor drive zero-crossing detection circuit, which can solve the technical problem.
The embodiment of the application provides a no sense three-phase motor drive zero crossing detection circuitry, including first divider circuit, second divider circuit, third divider circuit, parallel circuit, first fortune is put circuit, second fortune and is put circuit and third fortune, the input of first divider circuit the input of second divider circuit the input of third divider circuit is connected with the three-phase line of motor respectively, first divider circuit second divider circuit, electrically conductive third divider circuit all with parallel circuit's one end is connected, the output of first divider circuit with the positive input of first fortune is put the circuit and is connected, the output of second divider circuit with the positive input of second fortune is put the circuit and is connected, the output of third fortune is put the circuit with the positive input of third fortune is put the circuit and is connected, parallel circuit's the other end respectively with first fortune is put the circuit the second fortune is put the circuit with the negative input of third fortune is put the circuit and is connected, the output of first fortune is put the circuit the output of second fortune and the output of third fortune is put the circuit respectively.
Preferably, the first voltage-dividing circuit includes a resistor R217, a resistor R219, and a capacitor C195, the first operational amplifier circuit includes a capacitor C31, an amplifier U2A, a resistor R33, and a capacitor C28, one end of the resistor R217 is connected to one of the three-phase lines of the motor, the other end of the resistor R217 is connected to the third interface of the amplifier U2A, one end of the resistor R219 and one end of the capacitor C195 are respectively connected to the other end of the resistor R217, the other ends of the resistor R219 and the capacitor C195 are both grounded, the second interface of the amplifier U2A is connected to the parallel circuit, the third interface of the amplifier U2A is connected to one end of the resistor R33, the other end of the resistor R33 is an output end of a zero-crossing signal, one end of the capacitor C28 is connected to the other end of the resistor R33, the other end of the capacitor C28 is grounded, one end of the capacitor C31 is grounded, the other end of the capacitor C31 is connected to the eighth interface of the amplifier U2A, and the fourth interface of the amplifier U2A is grounded.
Preferably, the second voltage-dividing circuit includes a resistor R217, a resistor R32, and a capacitor C107, the second operational amplifier circuit includes a capacitor C33, an amplifier U2B, a resistor R40, and a capacitor C29, one end of the resistor R217 is connected to one of the three phase lines of the motor, the other end of the resistor R217 is connected to the third interface of the amplifier U2B, one end of the resistor R32 and one end of the capacitor C107 are respectively connected to the other end of the resistor R217, the other ends of the resistor R32 and the capacitor C107 are both grounded, the second interface of the amplifier U2B is connected to the parallel circuit, the third interface of the amplifier U2B is connected to one end of the resistor R40, the other end of the resistor R40 is an output end of a zero-crossing signal, one end of the capacitor C29 is connected to the other end of the resistor R40, the other end of the capacitor C29 is grounded, one end of the capacitor C33 is grounded, the other end of the capacitor C33 is connected to the eighth interface of the amplifier U2B, and the fourth interface of the amplifier U2B is grounded.
Preferably, the third voltage division circuit includes a resistor R189, a resistor R191, and a capacitor C108, the third operational amplifier circuit includes a capacitor C32, an amplifier U2C, a resistor R42, and a capacitor C30, one end of the resistor R189 is connected to one of the three phase lines of the motor, the other end of the resistor R189 is connected to the third interface of the amplifier U2C, one end of the resistor R191 and one end of the capacitor C108 are respectively connected to the other end of the resistor R189, the other end of the resistor R191 and the other end of the capacitor C108 are both grounded, the second interface of the amplifier U2C is connected to the parallel circuit, the third interface of the amplifier U2C is connected to one end of the resistor R42, the other end of the resistor R42 is an output end of a zero-crossing signal, one end of the capacitor C30 is connected to the other end of the resistor R42, the other end of the capacitor C30 is grounded, one end of the capacitor C32 is grounded, the other end of the capacitor C32 is connected to the eighth interface of the amplifier U2C, and the fourth interface of the amplifier U2C is grounded.
Preferably, the parallel circuit includes a resistor R41, a resistor 190, and a resistor R192, and the resistor R41, the resistor 190, and the resistor R192 are connected in parallel.
The utility model has the advantages that:
the utility model provides a non-inductive three-phase motor drive zero crossing detection circuit, including first divider circuit, second divider circuit, third divider circuit, parallel circuit, first fortune circuit, second fortune circuit and third fortune circuit of putting, the input of first divider circuit, the input of second divider circuit, the input of third divider circuit is connected with the three-phase line of motor respectively, first divider circuit, second divider circuit, electrically conductive third divider circuit all with one end of parallel circuit is connected, the output of first divider circuit with the positive input of first fortune circuit is connected, the output of second divider circuit with the positive input of second fortune circuit is connected, the output of third divider circuit with the positive input of third fortune circuit is connected, parallel circuit's the other end respectively with first fortune is put the circuit the second fortune is put the circuit with the negative pole input of third fortune is put the circuit is connected, first fortune is put the output of circuit the output of second fortune is put the output of circuit and the zero cross signal is exported respectively to the third fortune, the utility model discloses a first divider circuit, second divider circuit, third voltage division circuit connect the three-phase motor line, do resistance partial pressure and fortune through first divider circuit, second divider circuit, third voltage division circuit, first fortune is put circuit, second fortune is put circuit and third fortune and is put the circuit and do the comparison back, export COMP-U, COMP-V, COMP-W3 zero cross signal, through the alternating current signal who detects the three-phase, confirm the zero cross point, the utility model discloses a zero cross signal detection circuitry is simple, manufacturing cost is lower.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a connection diagram of electronic components of a first operational amplifier circuit, a second operational amplifier circuit and a third operational amplifier circuit according to the present invention;
fig. 2 is a connection diagram of the electronic components of the first voltage-dividing circuit, the second voltage-dividing circuit and the third voltage-dividing circuit of the present invention;
fig. 3 is a parallel circuit diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
As shown in fig. 1-3, a non-inductive three-phase motor drive zero-crossing detection circuit, including first voltage divider circuit, second voltage divider circuit, third voltage divider circuit, parallel circuit, first voltage divider circuit, second voltage divider circuit and third voltage divider circuit, the input of first voltage divider circuit, the input of second voltage divider circuit, the input of third voltage divider circuit is connected with the three-phase line of motor respectively, first voltage divider circuit, second voltage divider circuit, electrically conductive third voltage divider circuit all with the one end of parallel circuit is connected, the output of first voltage divider circuit with the positive input of first voltage divider circuit, the output of second voltage divider circuit with the positive input of second voltage divider circuit, the output of third voltage divider circuit with the positive input of third voltage divider circuit, the other end of parallel circuit respectively with the negative input of first voltage divider circuit, second voltage divider circuit with the negative input of third voltage divider circuit connects, the output of first voltage divider circuit, second voltage divider circuit with the output of third voltage divider circuit, the three-phase point detection circuit is through the three-phase voltage divider circuit, the three-phase signal detection circuit is simple, the three-phase detection circuit is realized through the first three-phase signal detection circuit, the three-phase detection circuit is simple.
As shown in fig. 1-2, in this embodiment, the first voltage dividing circuit includes a resistor R217, a resistor R219, and a capacitor C195, the first operational amplifier circuit includes a capacitor C31, an amplifier U2A, a resistor R33, and a capacitor C28, one end of the resistor R217 is connected to one of the three phase lines of the motor, the other end of the resistor R217 is connected to the third interface of the amplifier U2A, one end of the resistor R219 and one end of the capacitor C195 are respectively connected to the other end of the resistor R217, the other end of the resistor R219 and the other end of the capacitor C195 are both grounded, the second interface of the amplifier U2A is connected to the parallel circuit, the third interface of the amplifier U2A is connected to one end of the resistor R33, the other end of the resistor R33 is an output end of a zero-crossing signal, one end of the capacitor C28 is connected to the other end of the resistor R33, the other end of the capacitor C28 is grounded, one end of the capacitor C31 is grounded, the other end of the capacitor C31 is connected to one end of the eighth interface of the amplifier U2A, and the fourth interface of the amplifier U2A is connected to the ground.
As shown in fig. 1-2, in this embodiment, the second voltage dividing circuit includes a resistor R217, a resistor R32, and a capacitor C107, the second operational amplifier circuit includes a capacitor C33, an amplifier U2B, a resistor R40, and a capacitor C29, one end of the resistor R217 is connected to one of the three phase lines of the motor, the other end of the resistor R217 is connected to the third interface of the amplifier U2B, one end of the resistor R32 and one end of the capacitor C107 are respectively connected to the other end of the resistor R217, the other end of the resistor R32 and the other end of the capacitor C107 are both grounded, the second interface of the amplifier U2B is connected to the parallel circuit, the third interface of the amplifier U2B is connected to one end of the resistor R40, the other end of the resistor R40 is an output end of a zero-crossing signal, one end of the capacitor C29 is connected to the other end of the resistor R40, the other end of the capacitor C29 is grounded, one end of the capacitor C33 is grounded, the other end of the capacitor C33 is connected to one end of the eighth interface of the amplifier U2B, and the fourth interface of the amplifier U2B is connected to the ground.
As shown in fig. 1-2, in this embodiment, the third voltage division circuit includes a resistor R189, a resistor R191, and a capacitor C108, the third operational amplifier circuit includes a capacitor C32, an amplifier U2C, a resistor R42, and a capacitor C30, one end of the resistor R189 is connected to one of the three phase lines of the motor, the other end of the resistor R189 is connected to the third interface of the amplifier U2C, one end of the resistor R191 and one end of the capacitor C108 are respectively connected to the other end of the resistor R189, the other end of the resistor R191 and the other end of the capacitor C108 are both grounded, the second interface of the amplifier U2C is connected to the parallel circuit, the third interface of the amplifier U2C is connected to one end of the resistor R42, the other end of the resistor R42 is an output end of a zero-crossing signal, one end of the capacitor C30 is connected to the other end of the resistor R42, the other end of the capacitor C30 is grounded, one end of the capacitor C32 is grounded, the other end of the capacitor C32 is connected to one end of the eighth interface of the amplifier U2C, and the fourth interface of the amplifier U2C is connected to the ground.
As shown in fig. 3, in this embodiment, the parallel circuit includes a resistor R41, a resistor 190, and a resistor R192, and the resistor R41, the resistor 190, and the resistor R192 are connected in parallel.
The utility model discloses a circuit is simple, and is less at the in-process current loss that detects, and it is convenient fast to detect, and detects the accuracy higher.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (5)
1. The non-inductive three-phase motor driving zero-crossing detection circuit is characterized in that: the power supply comprises a first voltage division circuit, a second voltage division circuit, a third voltage division circuit, a parallel circuit, a first operational amplifier circuit, a second operational amplifier circuit and a third operational amplifier circuit, wherein the input end of the first voltage division circuit, the input end of the second voltage division circuit and the input end of the third voltage division circuit are respectively connected with three phase lines of a motor, the first voltage division circuit, the second voltage division circuit and the conductive third voltage division circuit are all connected with one end of the parallel circuit, the output end of the first voltage division circuit is connected with the positive input end of the first operational amplifier circuit, the output end of the second voltage division circuit is connected with the positive input end of the second operational amplifier circuit, the output end of the third voltage division circuit is connected with the positive input end of the third operational amplifier circuit, the other end of the parallel circuit is respectively connected with the negative input ends of the first operational amplifier circuit, the second operational amplifier circuit and the third operational amplifier circuit, and the output end of the first operational amplifier circuit, the second operational amplifier circuit and the third operational amplifier circuit respectively output zero-crossing signals.
2. The non-inductive three-phase motor drive zero-crossing detection circuit according to claim 1, characterized in that: the first voltage division circuit comprises a resistor R217, a resistor R219 and a capacitor C195, the first operational amplifier circuit comprises a capacitor C31, an amplifier U2A, a resistor R33 and a capacitor C28, one end of the resistor R217 is connected with one of three phase lines of the motor, the other end of the resistor R217 is connected with a third interface of the amplifier U2A, one end of the resistor R219 and one end of the capacitor C195 are respectively connected with the other end of the resistor R217, the other end of the resistor R219 and the other end of the capacitor C195 are both grounded, a second interface of the amplifier U2A is connected with the parallel circuit, a third interface of the amplifier U2A is connected with one end of the resistor R33, the other end of the resistor R33 is an output end of a zero-crossing signal, one end of the capacitor C28 is connected with the other end of the resistor R33, the other end of the capacitor C28 is grounded, one end of the capacitor C31 is grounded, the other end of the capacitor C31 is connected with an eighth interface of the amplifier U2A, and a fourth interface of the amplifier U2A is grounded.
3. The non-inductive three-phase motor drive zero-crossing detection circuit according to claim 1, characterized in that: the second voltage division circuit comprises a resistor R217, a resistor R32 and a capacitor C107, the second operational amplifier circuit comprises a capacitor C33, an amplifier U2B, a resistor R40 and a capacitor C29, one end of the resistor R217 is connected with one of three phase lines of the motor, the other end of the resistor R217 is connected with a third interface of the amplifier U2B, one end of the resistor R32 and one end of the capacitor C107 are respectively connected with the other end of the resistor R217, the other end of the resistor R32 and the other end of the capacitor C107 are both grounded, a second interface of the amplifier U2B is connected with the parallel circuit, a third interface of the amplifier U2B is connected with one end of the resistor R40, the other end of the resistor R40 is an output end of a zero-crossing signal, one end of the capacitor C29 is connected with the other end of the resistor R40, the other end of the capacitor C29 is grounded, one end of the capacitor C33 is grounded, the other end of the capacitor C33 is connected with an eighth interface of the amplifier U2B, and a fourth interface of the amplifier U2B is grounded.
4. The non-inductive three-phase motor drive zero-crossing detection circuit according to claim 1, characterized in that: the third voltage division circuit comprises a resistor R189, a resistor R191 and a capacitor C108, the third operational amplifier circuit comprises a capacitor C32, an amplifier U2C, a resistor R42 and a capacitor C30, one end of the resistor R189 is connected with one of three phase lines of the motor, the other end of the resistor R189 is connected with a third interface of the amplifier U2C, one end of the resistor R191 and one end of the capacitor C108 are respectively connected with the other end of the resistor R189, the other end of the resistor R191 and the other end of the capacitor C108 are both grounded, a second interface of the amplifier U2C is connected with the parallel circuit, a third interface of the amplifier U2C is connected with one end of the resistor R42, the other end of the resistor R42 is an output end of a zero-crossing signal, one end of the capacitor C30 is connected with the other end of the resistor R42, the other end of the capacitor C30 is grounded, one end of the capacitor C32 is grounded, the other end of the capacitor C32 is connected with an eighth interface of the amplifier U2C, and a fourth interface of the amplifier U2C is grounded.
5. The non-inductive three-phase motor drive zero-crossing detection circuit according to claim 1, characterized in that: the parallel circuit comprises a resistor R41, a resistor 190 and a resistor R192, wherein the resistor R41, the resistor 190 and the resistor R192 are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222831393.3U CN218767095U (en) | 2022-10-26 | 2022-10-26 | Non-inductive three-phase motor drive zero-crossing detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222831393.3U CN218767095U (en) | 2022-10-26 | 2022-10-26 | Non-inductive three-phase motor drive zero-crossing detection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN218767095U true CN218767095U (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222831393.3U Active CN218767095U (en) | 2022-10-26 | 2022-10-26 | Non-inductive three-phase motor drive zero-crossing detection circuit |
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| CN (1) | CN218767095U (en) |
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2022
- 2022-10-26 CN CN202222831393.3U patent/CN218767095U/en active Active
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