CN213423791U - Novel motor controller analog current output circuit - Google Patents
Novel motor controller analog current output circuit Download PDFInfo
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- CN213423791U CN213423791U CN202022790878.3U CN202022790878U CN213423791U CN 213423791 U CN213423791 U CN 213423791U CN 202022790878 U CN202022790878 U CN 202022790878U CN 213423791 U CN213423791 U CN 213423791U
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Abstract
The embodiment of the utility model discloses novel machine controller analog current output circuit, including low pass filter circuit, signal amplification circuit, power amplification circuit, low pass filter circuit, signal amplification circuit, power amplification circuit electricity in proper order are connected, still through an electric capacity C3 ground connection between signal amplification circuit and the power amplification circuit, and low pass filter circuit is used for handling main control chip PWM output signal, and signal amplification circuit amplifies the signal after low pass filter circuit handles, and power amplification circuit is according to the signal output electric current after enlargiing. The utility model has the advantages of simple structure, low cost, the linearity is good, and the reliability is high.
Description
Technical Field
The utility model relates to a new energy automobile's machine controller technical field especially relates to a novel machine controller analog current output circuit.
Background
In a motor controller of a new energy automobile, an analog output signal is often required to control other electronic devices. The analog output signal is generally divided into an analog voltage output type and an analog current output type, and the analog voltage output type is greatly limited in use due to the defects of short transmission distance and poor anti-interference capability. Most of electronic equipment in high-requirement occasions is controlled by adopting analog current output signals.
At present, most of analog current output signals adopt special integrated chips, the output current is small, and the cost of the integrated chips is high.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a technical problem who solves lies in, provides a novel machine controller analog current output circuit to simplify the structure, reduce cost promotes the reliability.
In order to solve the technical problem, the embodiment of the utility model provides a novel machine controller analog current output circuit, including low pass filter circuit, signal amplification circuit, power amplification circuit, low pass filter circuit, signal amplification circuit, power amplification circuit electricity in proper order is connected, still through an electric capacity C3 ground connection between signal amplification circuit and the power amplification circuit, low pass filter circuit is used for handling main control chip PWM output signal, the signal after signal amplification circuit enlargies low pass filter circuit and handles, power amplification circuit is according to the signal output current after the enlargeing.
Further, the low-pass filter circuit is constituted by chip-shaped resistors R1, R2 and chip-shaped capacitors C1, C2; one end of the resistor R2 is connected with the resistor R1, and the other end is connected with the signal amplifying circuit; one end of the capacitor C1 is grounded, and the other end is connected with one end of the resistor R2; one end of the capacitor C2 is grounded, and the other end is connected with the other end of the resistor R2.
Furthermore, the signal amplification circuit is composed of chip-shaped resistors R3 and R4 and an operational amplifier U1, wherein the non-inverting input end of the operational amplifier U1 is connected with the low-pass filter circuit, the inverting input end of the operational amplifier U1 is grounded through a resistor R3, and the output end of the operational amplifier U1 is connected with the power amplification circuit; two ends of the resistor R4 are respectively connected with the inverting input end and the output end of the operational amplifier U1.
Furthermore, the power amplification circuit is composed of an operational amplifier U2, a power triode Q1, a chip capacitor C4 and chip resistors R5, R6, R7, R8, R9 and R10, wherein the non-inverting input end of the operational amplifier U2 is connected with the signal amplification circuit through the resistor R6, the inverting input end of the operational amplifier U2 is grounded through the resistor R5, and the output end of the operational amplifier U is connected with the base electrode of the power triode Q1 through the resistor R9; the emitter of the power triode Q1 is grounded through a resistor R10 and a capacitor C4 which are connected in series; one end of the resistor R7 is connected with the inverting input end of the operational amplifier U2, and the other end is connected with the emitter of the power triode Q1; the resistor R8 has one end connected to the non-inverting input terminal of the operational amplifier U2 and the other end connected between the resistor R10 and the capacitor C4, and outputs a current.
The utility model has the advantages that: the utility model has the advantages of simple structure, low cost, the linearity is good, and the reliability is high.
Drawings
Fig. 1 is a circuit diagram of an analog current output circuit of a novel motor controller according to an embodiment of the present invention.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict, and the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.
In the embodiment of the present invention, if there is directional indication (such as upper, lower, left, right, front, and rear … …) only for explaining the relative position relationship between the components and the motion situation under a certain posture (as shown in the drawing), if the certain posture is changed, the directional indication is changed accordingly.
In addition, the descriptions of the first, second, etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Referring to fig. 1, the novel motor controller analog current output circuit according to the embodiment of the present invention includes a low-pass filter circuit, a signal amplifier circuit, and a power amplifier circuit.
The low-pass filter circuit, the signal amplifying circuit and the power amplifying circuit are electrically connected in sequence. The signal amplification circuit and the power amplification circuit are grounded through a capacitor C3, the low-pass filter circuit is used for processing the PWM output signal of the main control chip, the signal amplification circuit amplifies the signal processed by the low-pass filter circuit, and the power amplification circuit outputs current according to the amplified signal.
As an embodiment, the low-pass filter circuit is constituted by chip-shaped resistors R1, R2 and chip-shaped capacitors C1, C2; one end of the resistor R2 is connected with the resistor R1, and the other end is connected with the signal amplifying circuit; one end of the capacitor C1 is grounded, and the other end is connected with one end of the resistor R2; one end of the capacitor C2 is grounded, and the other end is connected with the other end of the resistor R2.
In one embodiment, the signal amplifying circuit is composed of chip-shaped resistors R3 and R4 and an operational amplifier U1, wherein a non-inverting input terminal (i.e., an input terminal anode) of the operational amplifier U1 is connected to the low-pass filter circuit, an inverting input terminal (i.e., an input terminal cathode) is grounded through a resistor R3, and an output terminal is connected to the power amplifying circuit; two ends of the resistor R4 are respectively connected with the inverting input end and the output end of the operational amplifier U1. The positive power supply end of the operational amplifier U1 is connected with a power supply, and the negative power supply end is grounded.
As an implementation, the power amplifying circuit is composed of an operational amplifier U2, a power transistor Q1, a chip capacitor C4, and chip resistors R5, R6, R7, R8, R9, and R10, wherein the non-inverting input terminal of the operational amplifier U2 is connected to the signal amplifying circuit through the resistor R6, the inverting input terminal is grounded through the resistor R5, and the output terminal is connected to the base of the power transistor Q1 through the resistor R9; the emitter of the power triode Q1 is grounded through a resistor R10 and a capacitor C4 which are connected in series; one end of the resistor R7 is connected with the inverting input end of the operational amplifier U2, and the other end is connected with the emitter of the power triode Q1; the resistor R8 has one end connected to the non-inverting input terminal of the operational amplifier U2 and the other end connected between the resistor R10 and the capacitor C4, and outputs a current. The positive power supply end of the operational amplifier U2 is connected with a power supply, and the negative power supply end is grounded. The collector of the power transistor Q1 is connected to the power supply.
Referring to fig. 1, the PWM output signal of the main control chip has a voltage amplitude of Vin, a duty ratio of D, and an output current of Iout, wherein the power amplifier circuit part resistors R5= R6, R7= R8,
the output voltage through the low-pass filter circuit is: vin x D
The output voltage of the signal amplification circuit is as follows: vin x D (R3+ R4)/R3
The output voltage of the power amplifying circuit is as follows: (R7/R5) Vin D (R3+ R4)/R3
Output current: iout = Vin × D (R3+ R4)/R3 × (R7/R5)/R10
From the formula, the output current Iout and the duty ratio D of the PWM output signal of the main control chip are in a direct proportional relation, and the linearity is very good. By selecting a proper resistance value of the resistor, the main control chip can accurately control the output current Iout.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a novel motor controller analog current output circuit, its characterized in that, including low pass filter circuit, signal amplification circuit, power amplification circuit, low pass filter circuit, signal amplification circuit, power amplification circuit electricity in proper order connect, still through a electric capacity C3 ground connection between signal amplification circuit and the power amplification circuit, low pass filter circuit is used for handling main control chip PWM output signal, signal amplification circuit amplifies the signal after low pass filter circuit handles, power amplification circuit is according to the signal output current after the amplification.
2. The novel motor controller analog current output circuit of claim 1, wherein said low pass filter circuit is composed of chip resistors R1, R2 and chip capacitors C1, C2; one end of the resistor R2 is connected with the resistor R1, and the other end is connected with the signal amplifying circuit; one end of the capacitor C1 is grounded, and the other end is connected with one end of the resistor R2; one end of the capacitor C2 is grounded, and the other end is connected with the other end of the resistor R2.
3. The novel motor controller analog current output circuit as claimed in claim 1, wherein the signal amplifying circuit is composed of chip resistors R3 and R4 and an operational amplifier U1, the non-inverting input terminal of the operational amplifier U1 is connected with a low-pass filter circuit, the inverting input terminal is grounded through a resistor R3, and the output terminal is connected with a power amplifying circuit; two ends of the resistor R4 are respectively connected with the inverting input end and the output end of the operational amplifier U1.
4. The novel motor controller analog current output circuit as claimed in claim 1, wherein the power amplifying circuit is composed of an operational amplifier U2, a power transistor Q1, a chip capacitor C4, and chip resistors R5, R6, R7, R8, R9, R10, the non-inverting input terminal of the operational amplifier U2 is connected to the signal amplifying circuit through the resistor R6, the inverting input terminal is grounded through the resistor R5, and the output terminal is connected to the base of the power transistor Q1 through the resistor R9; the emitter of the power triode Q1 is grounded through a resistor R10 and a capacitor C4 which are connected in series; one end of the resistor R7 is connected with the inverting input end of the operational amplifier U2, and the other end is connected with the emitter of the power triode Q1; the resistor R8 has one end connected to the non-inverting input terminal of the operational amplifier U2 and the other end connected between the resistor R10 and the capacitor C4, and outputs a current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022790878.3U CN213423791U (en) | 2020-11-27 | 2020-11-27 | Novel motor controller analog current output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022790878.3U CN213423791U (en) | 2020-11-27 | 2020-11-27 | Novel motor controller analog current output circuit |
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| Publication Number | Publication Date |
|---|---|
| CN213423791U true CN213423791U (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022790878.3U Active CN213423791U (en) | 2020-11-27 | 2020-11-27 | Novel motor controller analog current output circuit |
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|---|---|
| CN (1) | CN213423791U (en) |
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2020
- 2020-11-27 CN CN202022790878.3U patent/CN213423791U/en active Active
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