CN213780782U - Linear-change output reference voltage circuit and electrical equipment applying same - Google Patents
Linear-change output reference voltage circuit and electrical equipment applying same Download PDFInfo
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- CN213780782U CN213780782U CN202022871921.9U CN202022871921U CN213780782U CN 213780782 U CN213780782 U CN 213780782U CN 202022871921 U CN202022871921 U CN 202022871921U CN 213780782 U CN213780782 U CN 213780782U
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Abstract
The utility model discloses a linear change's output reference voltage circuit and use its electrical equipment, wherein, linear change's output reference voltage circuit includes: the pulse width modulation circuit comprises a linear input module used for inputting a pulse width modulation signal, a steady-state resistance voltage division module used for outputting a linear voltage according to the pulse width modulation signal and a low-pass filtering module used for outputting the linear voltage in a steady state. The utility model discloses a linear change's output reference voltage circuit, through linear input module input pulse width modulation signal, through stable state resistance partial pressure module according to pulse width modulation signal output linear voltage, through low pass filter module with linear voltage steady state output, thereby abandon the reference voltage output circuit of resistance partial pressure formula, avoid the simplification, adopt the output reference voltage circuit based on field effect transistor and pulse width modulation signal's linear change, realize dynamic linear output, widen control range, advantages such as high efficiency.
Description
Technical Field
The utility model belongs to the technical field of drive plate reference voltage, concretely relates to output reference voltage circuit and use its electrical equipment of linear change.
Background
Peripheral loads of driving plates of household appliances such as a range hood, a steaming and baking all-in-one machine and the like in the market, such as a water pump, a push rod motor, illumination and the like, usually work at random working condition current, and the reference voltage of the peripheral loads is mostly fixed resistance voltage division type output;
however, the fixed resistance voltage-dividing type reference voltage has the problems that a current reference voltage suitable for a wide working condition point cannot be provided for a peripheral device load, the voltage is single, linear dynamic control cannot be achieved, and the like, and objective phenomena such as poor customer experience, reduced brand quality and the like are directly caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a linear change's output reference voltage circuit realizes the linear output of developments, widens advantages such as control range, high efficiency.
Another object of the utility model is to provide an electrical equipment.
The utility model adopts the technical proposal that:
a linearly-changed output reference voltage circuit comprises a linear input module 1 used for inputting a pulse width modulation signal, a steady-state resistance voltage division module 2 used for outputting linear voltage according to the pulse width modulation signal and a low-pass filtering module 3 used for outputting the linear voltage in a steady state, wherein the linear input module 1 is electrically connected with the steady-state resistance voltage division module 2 and the low-pass filtering module 3 in sequence.
Preferably, the linear input module 1 includes a first resistor R1, a second resistor R2 and a first capacitor C1, one end of the first resistor R1 is electrically connected to the pulse width modulation signal, the other end of the first resistor R3526 is electrically connected to one end of the second resistor R2 and one end of the first capacitor C1, and the other end of the second resistor R2 and the other end of the first capacitor C1 are both grounded.
Preferably, the steady-state resistance voltage-dividing module 2 includes a field-effect transistor Q1, a third resistor R3, a fourth resistor R4 and a fifth resistor R5, a gate of the field-effect transistor Q1 is electrically connected to a common connection end of the first resistor R1, the second resistor R2 and the first capacitor C1, a drain of the field-effect transistor Q1 is connected in series with the fourth resistor R4 and then connected in parallel with one end of the third resistor R3 and one end of the fifth resistor R5, the other end of the third resistor R3 is connected to a first power supply, and a source of the field-effect transistor Q1 and the other end of the fifth resistor R5 are both grounded.
Preferably, the low pass filter module 3 includes a sixth resistor R6 and a second capacitor C2, one end of the sixth resistor R6 is electrically connected to the common connection end of the third resistor R3 and the fifth resistor R5, the other end of the sixth resistor R6 is electrically connected to one end of the second capacitor C2 and the output voltage VREF, and the other end of the second capacitor C2 is grounded.
Preferably, the cut-off frequency of the low-pass filtering module is f ═ 1/(2 pi × R _ R6 × C _ C2).
Preferably, the voltage of the first power supply is 5V.
The utility model discloses a another technical scheme is realized like this:
an electrical device comprising said linearly varying output reference voltage circuit.
Compared with the prior art, the utility model discloses a linear change's output reference voltage circuit, through linear input module input pulse width modulation signal, according to pulse width modulation signal output linear voltage through stable state resistance voltage divider module, through low pass filter module with linear voltage steady state output, thereby abandon the reference voltage output circuit of resistance voltage division formula, avoid the simplification, adopt the output reference voltage circuit based on field effect transistor and pulse width modulation signal's linear change, realize dynamic linear output, widen control range, advantages such as high efficiency, promote the household electrical appliances drive plate about peripheral load like the push rod motor, a water pump, the wide reference voltage of devices such as light, be adapted to multiple operating mode, promote customer experience degree.
Drawings
Fig. 1 is a circuit diagram of a linearly-varying output reference voltage circuit provided in embodiment 1 of the present invention;
fig. 2 is a schematic diagram of a linearly varying output reference voltage circuit according to embodiment 1 of the present invention.
Description of the reference numerals
The device comprises a 1-linear input module, a 2-steady-state resistance voltage division module and a 3-low-pass filtering module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment of the utility model provides a linear output reference voltage circuit who changes, as shown in fig. 1-2, including linear input module 1 that is used for inputing pulse width modulation signal, be used for according to pulse width modulation signal output linear voltage's steady state resistance voltage divider module 2 and be used for the low pass filter module 3 with linear voltage steady state output, linear input module 1 electricity connection steady state resistance voltage divider module 2 and low pass filter module 3 in proper order.
Like this, pulse width modulation signal is input through linear input module 1, output linear voltage according to pulse width modulation signal through stable resistance voltage division module 2, output linear voltage steady state through low pass filter module, thereby abandon the reference voltage output circuit of resistance voltage division formula, avoid the simplification, adopt the output reference voltage circuit based on field effect transistor and the linear change of pulse width modulation signal, realize dynamic linear output, widen control range, advantages such as high efficiency, promote the wide reference voltage of household electrical appliances drive plate about peripheral load such as push rod motor, water pump, devices such as light, be adapted to multiple operating mode, promote customer experience.
The linear input module 1 comprises a first resistor R1, a second resistor R2 and a first capacitor C1, wherein one end of the first resistor R1 is electrically connected with a pulse width modulation signal, the other end of the first resistor R3526 is electrically connected with one end of the second resistor R2 and one end of the first capacitor C1, and the other end of the second resistor R2 and the other end of the first capacitor C1 are both grounded.
Thus, the linear input module 1 receives a pulse width modulation signal (i.e., a PWM signal) and provides it to the steady-state resistance voltage divider module 2.
The steady-state resistance voltage division module 2 comprises a field effect transistor Q1, a third resistor R3, a fourth resistor R4 and a fifth resistor R5, the grid electrode of the field effect transistor Q1 is electrically connected with the common connection end of the first resistor R1, the second resistor R2 and the first capacitor C1, the drain electrode of the field effect transistor Q1 is connected with one end of the third resistor R3 and one end of the fifth resistor R5 in parallel after being connected with the fourth resistor R4 in series, the other end of the third resistor R3 is connected with a first power supply, and the source electrode of the field effect transistor Q1 and the other end of the fifth resistor R5 are all grounded. Wherein the voltage of the first power supply is 5V.
Thus, when the PWM is continuously 0, its output maximum voltage V _ R5 is 5V R _ R5/(R _ R3+ R _ R5); when the PWM continues to be 1, it outputs the lowest voltage V _ R5 ═ 5V × (R _ R5// R _ R4)/(R _ R3+ (R _ R5// R _ R4));
the low-pass filter module 3 comprises a sixth resistor R6 and a second capacitor C2, one end of the sixth resistor R6 is electrically connected to the common connection end of the third resistor R3 and the fifth resistor R5, the other end of the sixth resistor R6 is electrically connected to one end of the second capacitor C2 and the output voltage VREF, and the other end of the second capacitor C2 is grounded.
In this way, the cutoff frequency of the low-pass filter composed of the sixth resistor R6 and the second capacitor C2 is 1/(2 pi R _ R6C _ C2), and when the frequency of the PWM signal is greater than 10 times the cutoff frequency, the low-pass filter output voltage VREF is a steady-state constant.
When the frequency of the PWM signal is much greater than the cutoff frequency f 1/(2 pi R _ R6C _ C2), the linear dynamic output steady-state voltage is as follows:
when the duty ratio of the PWM is 0%, the output voltage VREF is: va ═ V _ R5 ═ 5V × R _ R5/(R _ R3+ R _ R5);
when the duty ratio of the PWM is 100%, the output voltage VREF is: vb ═ V _ R5 ═ 5V ═ R _ R5// R _ R4)/(R _ R3+ (R _ R5// R _ R4));
when the duty ratio of the PWM is 0-100%, the output voltage VREF ═ V _ R5 ═ (X × (5V × R _ R5/(R _ R3+ R _ R5)) + (1-X) × 5V (R _ R5// R _ R4)/(R _ R3+ (R _ R5// R _ R4)))/100%, and a one-dimensional equation about the duty ratio X of the PWM can be obtained after rationalization: VREF is KX + Y (where K is the slope and Y is a constant fixed value), so far a linearly varying output reference voltage VREF is achieved, the dynamic of which is shown in fig. 2 below.
The utility model discloses a linear change's output reference voltage circuit, pulse width modulation signal is input through linear input module, divide voltage module according to pulse width modulation signal output linear voltage through steady state resistance, output linear voltage steady state through low pass filter module, thereby abandon the reference voltage output circuit of resistance partial pressure formula, avoid the simplification, adopt the output reference voltage circuit based on field effect transistor and pulse width modulation signal's linear change, realize dynamic linear output, widen control range, advantages such as high efficiency, promote the household electrical appliances drive plate about peripheral load like the push rod motor, a water pump, the wide reference voltage of devices such as light, be adapted to multiple operating mode, promote customer experience.
Example 2
The embodiment 2 of the utility model provides an electrical equipment, it includes linear change's output reference voltage circuit.
Wherein, the electrical equipment is high-power electrical equipment such as a range hood, a steaming and baking integrated machine and the like.
The utility model discloses an electrical equipment, through linear input module input pulse width modulation signal, according to pulse width modulation signal output linear voltage through steady state resistance voltage dividing module, export linear voltage steady state through low pass filter module, thereby abandon the reference voltage output circuit of resistance voltage dividing formula, avoid the simplification, adopt the output reference voltage circuit based on field effect transistor and pulse width modulation signal's linear change, realize dynamic linear output, widen control range, advantages such as high efficiency, promote the household electrical appliances drive plate about peripheral load like the push rod motor, a water pump, the wide reference voltage of devices such as light, be adapted to multiple operating mode, improve developer's development efficiency, shorten development cycle, promote customer experience degree.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The linearly-changed output reference voltage circuit is characterized by comprising a linear input module (1) for inputting a pulse width modulation signal, a steady-state resistance voltage division module (2) for outputting linear voltage according to the pulse width modulation signal and a low-pass filtering module (3) for outputting the linear voltage in a steady state, wherein the linear input module (1) is electrically connected with the steady-state resistance voltage division module (2) and the low-pass filtering module (3) in sequence.
2. The linearly varying output reference voltage circuit according to claim 1, wherein the linear input module (1) comprises a first resistor R1, a second resistor R2 and a first capacitor C1, one end of the first resistor R1 is electrically connected to the pwm signal, the other end of the first resistor R1 is electrically connected to one end of the second resistor R2 and one end of the first capacitor C1, and the other end of the second resistor R2 and the other end of the first capacitor C1 are both grounded.
3. The linearly-variable output reference voltage circuit according to claim 2, wherein the steady-state resistor voltage-dividing module (2) comprises a field-effect transistor Q1, a third resistor R3, a fourth resistor R4 and a fifth resistor R5, the gate of the field-effect transistor Q1 is electrically connected to the common connection end of the first resistor R1, the second resistor R2 and the first capacitor C1, the drain of the field-effect transistor Q1 is connected in series with the fourth resistor R4 and then connected in parallel with one end of the third resistor R3 and one end of the fifth resistor R5, the other end of the third resistor R3 is connected to the first power supply, and the source of the field-effect transistor Q1 and the other end of the fifth resistor R5 are both grounded.
4. The linearly varying output reference voltage circuit according to claim 3, wherein the low pass filter module (3) comprises a sixth resistor R6 and a second capacitor C2, one end of the sixth resistor R6 is electrically connected to the common connection end of the third resistor R3 and the fifth resistor R5, the other end is electrically connected to one end of the second capacitor C2 and the output voltage VREF, and the other end of the second capacitor C2 is grounded.
5. The linearly varying output reference voltage circuit according to claim 4, characterized in that the cut-off frequency of the low-pass filtering module (3) is f-1/(2 π R6C _ C2).
6. A linearly varying output reference voltage circuit according to any of claims 3 to 5, wherein the voltage of the first power supply is 5V.
7. An electrical apparatus, characterized in that it comprises a linearly varying output reference voltage circuit according to any one of claims 1-6.
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| CN202022871921.9U CN213780782U (en) | 2020-12-04 | 2020-12-04 | Linear-change output reference voltage circuit and electrical equipment applying same |
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| CN202022871921.9U CN213780782U (en) | 2020-12-04 | 2020-12-04 | Linear-change output reference voltage circuit and electrical equipment applying same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047718A (en) * | 2021-10-19 | 2022-02-15 | 华帝股份有限公司 | Door control circuit and door body opening and closing device |
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- 2020-12-04 CN CN202022871921.9U patent/CN213780782U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047718A (en) * | 2021-10-19 | 2022-02-15 | 华帝股份有限公司 | Door control circuit and door body opening and closing device |
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