CN211880311U - Energy-saving starting power supply circuit - Google Patents
Energy-saving starting power supply circuit Download PDFInfo
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- CN211880311U CN211880311U CN202020216797.XU CN202020216797U CN211880311U CN 211880311 U CN211880311 U CN 211880311U CN 202020216797 U CN202020216797 U CN 202020216797U CN 211880311 U CN211880311 U CN 211880311U
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- diode
- power supply
- energy
- transformer
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Abstract
The utility model belongs to the technical field of the power technology and specifically relates to an energy-conserving start power supply circuit, including micro-transformer T1, diode D1, zener diode D2, wherein micro-transformer T1's former limit one end is connected with the power supply positive pole, and the other end passes through electric capacity C2 and is connected with GND 1; one end of a secondary side of the micro-transformer T1 is connected with a diode D1, the diode D1 is connected with a voltage stabilizing diode D2, a capacitor C1 and an electric load R1 in parallel, the other end of the micro-transformer T1 is connected with GND2, and the other ends of the voltage stabilizing diode D2, the capacitor C1 and the electric load R1 are connected with GND 2. The energy-saving starting power supply circuit obtained by the utility model supplies power instantly when being electrified, has the characteristics of current limiting and energy limiting, and improves the safety and reliability of the power load; after once power-on, the primary side is not switched on or off again, and the circuit does not consume energy any more.
Description
Technical Field
The utility model belongs to the technical field of the power technology and specifically relates to an energy-conserving start power supply circuit.
Background
In the prior art, many electric devices including but not limited to a switching power supply sometimes need to be powered at the moment of starting and powering on and then do not need to be powered, for example, the starting and the power supply of a PWM chip and the like;
the conventional practice is to adopt a larger resistor or RC combination to form a current-limiting voltage-reducing circuit to supply power to a required load for starting, but the circuit still consumes energy when power supply is not required;
for example, if the control chip is on the secondary side, the interference to the control chip is much smaller, the feedback can be directly sent to the control chip, the comprehensive performance can be improved, but the control part can only be placed on the primary side because the secondary side does not start power supply.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical deficiencies and providing an energy-conserving start power supply circuit, it will automatic shutdown work after triggering nature power supply, no longer consumes energy.
In order to achieve the above object, the utility model relates to an energy-saving starting power supply circuit, which comprises a micro-transformer T1, a diode D1 and a voltage stabilizing diode D2, wherein one end of the primary side of the micro-transformer T1 is connected with the positive pole of the power supply, and the other end is connected with a GND1 through a capacitor C2; one end of a secondary side of the micro-transformer T1 is connected with a diode D1, the diode D1 is connected with a voltage stabilizing diode D2, a capacitor C1 and an electric load R1 in parallel, the other end of the micro-transformer T1 is connected with GND2, and the other ends of the voltage stabilizing diode D2, the capacitor C1 and the electric load R1 are connected with GND 2.
When the power supply anode is electrified with GND1, a transient current passes through the primary side of a micro transformer T1 to charge a capacitor C2, the current is coupled through the micro transformer T1, then the capacitor C1 is charged from the secondary side through a diode D1 until the voltage is clamped on the selected value of a voltage stabilizing diode D2 after a voltage stabilizing diode D2 is triggered, and the power supply is started by an electric load R1; because the capacity of the capacitor C2 is limited, the primary side current disappears after the capacitor C2 is fully charged, and the power supply to the secondary side is stopped. This process is not repeated until the power circuit between the positive supply pole and GND1 is switched off and then switched back on.
After the circuit is triggered to supply power, the circuit can automatically stop working without consuming energy, so that the energy-saving effect is achieved.
The actual output voltage is related to the turn ratio of the micro-transformer T1 and the selected value of the zener diode D2, while the larger the capacitance of the capacitor C1, the longer the supply time but the lower the voltage, the larger the equivalent resistance of the electrical load R1 (the smaller the power consumption) the longer the voltage is maintained. Therefore, the capacity of the capacitor C1 is required to be selected according to the current requirement of the electric load R1, and the capacity of the capacitor C2 is selected according to the capacity of the capacitor C1 and the turn ratio of the micro transformer T1; GND1 and GND2 may be isolated or common.
If a circuit represented by the load resistor R1, such as a PWM chip, has a fault, the fault is not easily expanded because the current power supply time is short and the energy is small, and other circuits can be effectively protected.
The energy-saving starting power supply circuit obtained by the utility model supplies power instantly when being electrified, has the characteristics of current limiting and energy limiting, and improves the safety and reliability of the power load; after once power-on, the primary side is not switched on or off again, and the circuit does not consume energy any more.
By charging the capacitor C2, the current through the micro-transformer T1 connected in series between the power supply and the capacitor C1 is coupled to the secondary side of T1, charging the energy storage capacitor C1 through the diode D1, whose voltage is clamped by the zener diode D2 against overvoltage;
the electric energy stored by the capacitor C1 can be used for loads needing short-time one-time power supply;
the circuit charges the capacitor C1 only at the moment of electrifying, and then energy is not consumed any more due to the function of blocking direct current by the capacitor C2, so that the energy-saving effect is achieved.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
The invention is further described by the following embodiments in conjunction with the accompanying drawings.
Example 1:
as shown in fig. 1, the power supply circuit for energy saving start-up described in this embodiment includes a micro-transformer T1, a diode D1, and a zener diode D2, wherein one end of the primary side of the micro-transformer T1 is connected to the positive electrode of the power supply, and the other end is connected to GND1 through a capacitor C2; one end of a secondary side of the micro-transformer T1 is connected with a diode D1, the diode D1 is connected with a voltage stabilizing diode D2, a capacitor C1 and an electric load R1 in parallel, the other end of the micro-transformer T1 is connected with GND2, and the other ends of the voltage stabilizing diode D2, the capacitor C1 and the electric load R1 are connected with GND 2.
When the power supply anode is electrified with GND1, a transient current passes through the primary side of a micro transformer T1 to charge a capacitor C2, the current is coupled through the micro transformer T1, then the capacitor C1 is charged from the secondary side through a diode D1 until the voltage is clamped on the selected value of a voltage stabilizing diode D2 after a voltage stabilizing diode D2 is triggered, and the power supply is started by an electric load R1; because the capacity of the capacitor C2 is limited, the primary side current disappears after the capacitor C2 is fully charged, and the power supply to the secondary side is stopped. This process is not repeated until the power circuit between the positive supply pole and GND1 is switched off and then switched back on.
After the circuit is triggered to supply power, the circuit can automatically stop working without consuming energy, so that the energy-saving effect is achieved.
Claims (1)
1. An energy-saving starting power supply circuit is characterized in that: the device comprises a micro transformer T1, a diode D1 and a voltage stabilizing diode D2, wherein one end of the primary side of the micro transformer T1 is connected with the positive electrode of a power supply, and the other end of the primary side of the micro transformer T1 is connected with GND1 through a capacitor C2; one end of a secondary side of the micro-transformer T1 is connected with a diode D1, the diode D1 is connected with a voltage stabilizing diode D2, a capacitor C1 and an electric load R1 in parallel, the other end of the micro-transformer T1 is connected with GND2, and the other ends of the voltage stabilizing diode D2, the capacitor C1 and the electric load R1 are connected with GND 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020216797.XU CN211880311U (en) | 2020-02-27 | 2020-02-27 | Energy-saving starting power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020216797.XU CN211880311U (en) | 2020-02-27 | 2020-02-27 | Energy-saving starting power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211880311U true CN211880311U (en) | 2020-11-06 |
Family
ID=73255297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020216797.XU Expired - Fee Related CN211880311U (en) | 2020-02-27 | 2020-02-27 | Energy-saving starting power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211880311U (en) |
-
2020
- 2020-02-27 CN CN202020216797.XU patent/CN211880311U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20201106 |