TWM564744U - Power supply device with full-speed operation fan switch - Google Patents

Abstract

A power supply device having a fan full-speed operation switch, comprising a transformer, a rectifier, a power switch, a main controller, an output rectification and filter, a fan control unit and a fan; the transformer comprises a main winding, once a winding and an auxiliary winding; the rectifier is electrically connected to a mains mains and a main winding; the power switch is electrically connected to the main winding; and a main controller is electrically connected to the power switch to control the switching of the power switch between the on state and the cutoff device; The output rectification and the filter are electrically connected to the secondary winding; the fan control unit is electrically connected to the auxiliary winding and includes a switch; the fan is electrically connected to the fan control unit. When the switch is closed, the fan control unit drives the fan to rotate at full speed.

Description

Power supply device with fan full speed operation switch

The present invention relates to a power supply device having a fan full speed operation switch, and in particular to a power supply having a fan speed control function.

In order to allow the power supply device to dissipate heat smoothly, a fan is installed therein to generate an air flow to remove the heat generated by the heat source to prevent the electronic components therein from being damaged in a high temperature environment for a long time.

Fans that have been deployed in power supply devices in the past have been able to increase the rotational speed by detecting the ambient temperature around the electronic components or the fan and increasing the fixed rotational speed per unit time when the ambient temperature is increased. However, this cannot be instantaneously and quickly. Dissipate a large amount of heat generated.

In response to the problems described in the prior art, the fan control unit in the power supply device of the present invention having a fan full speed operation switch is configured with a switch for forcing the fan to rotate at full speed to enhance the heat release capability.

According to the present invention, a power supply device having a fan full speed operation switch is provided, which receives an AC mains power and generates an output voltage, and includes a transformer, a rectifier, a power switch, a main controller, an output rectification and a filter. , a fan control unit and a fan. The transformer comprises a main winding, a primary winding and an auxiliary winding separated from each other; the rectifier is electrically connected to the alternating current mains and the main winding; the power switch is electrically connected to the main winding The main controller is electrically connected to the power switch to control the switching of the power switch between the on state and the cutoff device; the output rectification and the filter are electrically connected to the secondary winding and rectify and filter the voltage electromagnetically coupled to the secondary winding The fan control unit includes a switch; the switch is disposed between the auxiliary winding and the fan, and the fan receives an auxiliary voltage from the auxiliary winding to perform full speed rotation when the switch is closed.

According to the present invention, another power supply device having a fan full-speed switching switch is provided, which receives an AC mains and generates an output voltage, and includes a transformer, a rectifier, a power switch, a main controller, an output rectification and filtering. a fan control unit and a fan. The transformer comprises a main winding, a primary winding and an auxiliary winding separated from each other; the rectifier is electrically connected to the AC mains and the main winding; the power switch is electrically connected to the main winding; the main controller is electrically connected to the power switch to control the power switch in the conducting state And switching between the cutoff devices; the output rectification and filter are electrically coupled to the secondary winding and the voltage electromagnetically coupled to the secondary winding is rectified and filtered to produce an output voltage. The fan control unit includes a driver and a switch, the driver is electrically connected to the auxiliary winding to receive an auxiliary voltage, and the switch is electrically connected to the driver. The fan has an internal equivalent resistance, one end of which is electrically connected to the auxiliary winding to receive the auxiliary voltage, and the other end is electrically connected to one end of the switch that is not connected to the driver; the fan rotates at full speed when the switch is opened, and the switch is closed at the switch When the speed is not full.

10, 10a, 10b‧‧‧ Power supply unit with fan full speed operation switch

101‧‧‧ primary side

102‧‧‧Secondary side

104‧‧‧Bridge rectifier

106‧‧‧Main controller

108‧‧‧Power switch

110‧‧‧Output rectification and filter

1102‧‧‧dipole

1104‧‧‧ capacitor

112‧‧‧Isolated feedback unit

120‧‧‧fan

122, 122a, 122b‧‧‧fan control unit

1220‧‧‧Toggle switch

1222‧‧‧ drive

1224‧‧‧First Diode

1226‧‧‧Secondary body

FB‧‧‧ feedback signal

GNDI‧‧‧ input ground

GNDO‧‧‧ output ground

LA‧‧‧Auxiliary winding

LP‧‧‧ main winding

LS‧‧‧Secondary winding

OUT+, OUT-‧‧‧ output

Rin‧‧‧ internal equivalent resistance

R1‧‧‧ first resistor

R2‧‧‧second resistor

VAC‧‧‧Community

VDD‧‧‧ DC voltage

VIN‧‧‧ input voltage

VOUT‧‧‧ output voltage

VAUX‧‧‧Auxiliary voltage

1 is a circuit block diagram of a power supply device having a fan full speed operation switch according to a first embodiment of the present invention; 2 is a circuit block diagram of a power supply device having a fan full speed operation switch according to a second embodiment of the present invention; and FIG. 3 is a power supply device having a fan full speed operation switch according to a third embodiment of the present invention; Circuit block diagram.

1 is a circuit block diagram of a power supply device having a fan full speed operation switch according to a first embodiment of the present invention. In FIG. 1, a power supply device (hereinafter referred to as "power supply device") 10 having a fan full-speed operation switch is classified into a galvanic insolated primary side 101 and a secondary side 102; the primary side 101 is electrically connected to The AC mains VAC, the secondary side 102 can provide an output voltage Vout to an electronic device (not shown) connected to the output terminals OUT+, OUT-.

The power supply 10 includes a main winding LP, a primary winding LS, an auxiliary winding LA, a bridge rectifier 104, a main controller 106, a power switch 108, an output rectification and filter 110, and an isolated feedback. The unit 112, a fan 120 and a fan control unit 122. The main winding LP, the secondary winding LS and the auxiliary winding LA cooperate to form a transformer (not labeled), and the main winding LP and the secondary winding LS cooperate to electromagnetically couple the voltage of the primary side 101 to the secondary side 102, the auxiliary winding LA It can be used to provide the operating voltage required for operation of components such as the main controller 106 and the fan control unit 122 in the power supply 10. In the present creation, the main winding LP and the auxiliary winding LA are disposed on the primary side 101, and the secondary winding LS is disposed on the secondary side 102.

The bridge rectifier 104, the main controller 106, and the power switch 108 are disposed on the primary side 101. The bridge rectifier 104 is electrically connected to the AC mains VAC; after the AC mains VAC is rectified via the bridge rectifier 104, an input voltage VIN is generated. The main winding LP receives the input voltage VIN.

The main controller 106 can control the on time of the power switch 108 to vary the current flowing through the main winding LP; thus, the transformer can store energy from the input voltage VIN and release energy from the secondary side 102 to establish the output voltage Vout. More specifically, the output rectification filter 110 is electrically coupled to the secondary winding LS and rectifies and filters the voltage electromagnetically coupled to the secondary winding LS to produce an output voltage Vout.

The output rectification and filter 110 can include a diode 1102 for rectification and a capacitor 1104 for filtering. The first end of the secondary winding LS is electrically connected to the anode of the diode 1102, and the second end thereof is electrically connected to the output ground GND0; the capacitor 1104 is electrically connected between the cathode of the diode 1102 and the output ground GND0. The voltage across the capacitor 1104 is taken as the output voltage Vout.

The isolation feedback unit 112 is electrically connected to the cathode of the diode 1102 and the capacitor 1104 to receive the output voltage Vout, and generates a feedback signal FB according to the output voltage Vout. The feedback signal FB is related to the output voltage Vout required by the electronics connected to the output terminals OUT+, OUT-. The isolation feedback unit 112 can be configured, for example, by a light-emitting member (not shown) disposed on the secondary side 102 and a light-receiving member disposed on the outgoing side 101. The light-emitting member and the light-receiving member cooperate to provide feedback related to the output voltage Vout. Signal FB is electrically isolated from secondary side 102 to primary side 101 to avoid electrical interference from primary side 101 and secondary side 102.

The main controller 106 is electrically connected to the auxiliary winding LA and the isolation feedback unit 112, and receives the auxiliary voltage VAUX and the feedback signal FB from the auxiliary winding LA. Auxiliary voltage VAUX as The operating voltage of the main controller 106. The main controller 106 generates a control signal output to the power switch 108 according to the feedback signal FB, so as to control the switching of the power switch 108 between the on state and the off device to change the current flowing through the main winding LP, thereby adjusting the output. Voltage Vout.

The fan control unit 122 is electrically connected to the auxiliary winding LA and the fan 120, receives the auxiliary voltage VAUX on the auxiliary winding LA, and controls the rotational speed of the fan 120. The auxiliary voltage VAUX can be used as the operating voltage of the fan control unit 122. It should be particularly noted that in the present embodiment, the required operating voltage of the fan control unit 122 is the same as the operating voltage of the main controller 106, and the turns ratio of the auxiliary winding LA and the main winding LP can be appropriately designed. Let the level of the auxiliary voltage VAUX be the same as the level of the required operating voltage of the main controller 106 and the fan control unit 122; however, in actual implementation, the level of the operating voltage of the main controller 106 may be different from the fan control unit 122. An operating voltage level, and a voltage regulator, such as a DC/DC voltage converter, may be additionally disposed between the main controller 106 and the auxiliary winding LA or between the fan control unit 122 and the auxiliary winding LA. The main controller 106 or the fan control unit 122 is powered by a boost or buck function.

In FIG. 1 , the fan control unit 122 includes a switch 1220 and a driver 1222; one end of the switch 1220 is electrically connected to the auxiliary winding LA to receive the auxiliary voltage VAUX, and the other end is electrically connected to the fan 120. The driver 1222 is connected in parallel with the changeover switch 1220.

In operation, if the operating temperature inside the power supply device 10 is lower than a predetermined value, the switch 120 is turned-off, and the fan 120 receives the drive letter output from the driver 1222. Turn and turn. The driver 1222 can be used, for example, to generate a pulse width modulation signal to change the rotational speed of the fan; in general, the greater the duty cycle of the pulse width modulation signal, the faster the rotational speed of the fan 120. It should be particularly noted that the driver 1222 can be provided with a temperature monitoring function, and can adjust the duty cycle of the pulse width modulation signal according to the temperature value monitored by itself when the operating temperature inside the power supply device 10 is lower than the predetermined value. The rotation speed of the fan 120 is changed to provide a good antipyretic effect for the power supply device 10.

If the operating temperature inside the power supply device 10 is higher than or equal to a predetermined value, the switch 1220 is turned-on to drive the fan 120 to rotate at full speed to prevent the power supply device 10 from malfunctioning or being damaged due to heat accumulation. In one embodiment of the present invention, when the changeover switch 1220 is closed (ie, the operating temperature inside the power supply device 10 is higher than or equal to the aforementioned predetermined value), the switch 1220 is turned on (ie, the operating temperature inside the power supply device 10 is lower than the foregoing). The fan 120 at the predetermined value may be in the same logical operating state. In another embodiment of the present creation, the fan 120 when the changeover switch 1220 is closed and when the changeover switch 1220 is turned on may be in an opposite logic operating state.

Although the pre-existing paragraph allows the switch 1220 to be closed or opened by whether the operating temperature inside the power supply device 10 reaches a predetermined value, in actual practice, the output voltage and/or output current of the power supply device 10 is not excluded. The decision condition for the switch 1220 to open or close.

2 is a circuit block diagram of a power supply device having a fan full speed operation switch according to a second embodiment of the present invention. The power supply device (hereinafter referred to as "power supply device") 10a having the fan full-speed operation changeover switch of FIG. 2 is similar to the power supply device 10 described in the foregoing first embodiment, and the same components are denoted by the same reference numerals; The difference between the two is that the fan control unit 122a of the present embodiment is composed of a switch 1220, a first diode 1224 and a second diode 1226.

In FIG. 2, one end of the changeover switch 1220 is electrically connected to the auxiliary winding LA to receive the auxiliary voltage VAUX, and the other end is electrically connected to the anode of the first diode 1224; the cathode of the first diode 1224 is electrically connected to the fan 120. The anode of the second diode 1226 is electrically connected to the DC voltage VDD, and the cathode is electrically connected to the fan 120. In the present embodiment, the level of the DC voltage VDD is lower than the level of the auxiliary voltage VAUX, and when the switch 1220 is turned-on and the auxiliary voltage VAUX is turned on to the fan 120, the fan 120 can be driven to rotate at full speed.

In addition, the fan control unit 122a further includes a first resistor R1 and a second resistor R2, which are used to provide a DC voltage VDD in cooperation with the auxiliary voltage VAUX. More specifically, the first resistor R1 and the second resistor R2 are connected in series, one end of the first resistor R1 not connected to the second resistor R2 is connected to the auxiliary voltage VAUX, and the second resistor R2 is not connected to the first One end of the resistor R1 is electrically connected to the input ground GNDI.

In operation, when the switch 1220 is turned-off, the DC voltage VDD generated after the auxiliary voltage AUX is divided by the first resistor R1 and the second resistor R2 is transmitted to the fan 120 through the second diode 1226. In order to drive the fan 120 to rotate. Due to the fact that the level of the auxiliary voltage VAUX is higher than the level of the DC voltage VDD, the speed of the fan 120 when the changeover switch 1220 is turned on is lower than the speed of the fan 120 when the changeover switch 1220 is closed. The functions and related descriptions of other components of the power supply device 10a are substantially the same as those of the power supply device 10, and are not described herein. The power supply device 10a can at least achieve the same function as the power supply device 10.

3 is a circuit block diagram of a power supply device having a fan full speed operation switching switch according to a third embodiment of the present invention. The power supply device (hereinafter referred to as "power supply device") 10b having the fan full-speed operation switching switch depicted in FIG. 3 is similar to the power supply device 10 of the first embodiment described above, and the same components are labeled the same. The difference between the two is that the fan control unit 122b of the present embodiment cooperates with one of the internal equivalent resistances Rin of the fan 120 to change the rotational speed of the fan 120.

In FIG. 3, the fan control unit 122b includes a switch 1220 and a driver 1222; the fan 120 has an internal equivalent resistor Rin. One end of the switch 1220 is connected to the driver 1222, and the other end is connected to the internal equivalent resistor Rin; the other end of the internal equivalent resistor Rin is connected to the auxiliary winding LA to receive the auxiliary voltage VAUX. The driver 1222 is also electrically connected to the auxiliary winding LA to receive the auxiliary voltage VAUX as an operating voltage.

In operation, when the changeover switch 1220 is turned-off, the internal equivalent resistance Rin of the fan 120 is correspondingly increased, causing the fan 120 to rotate at full speed. In contrast, when the changeover switch 1220 is turned-on, the internal resistance Rin of the fan 120 is correspondingly lowered, causing the fan 120 to decrease the rotational speed. The functions and related descriptions of other components of the power supply device 10b are substantially the same as those of the power supply device 10, and will not be described herein. The power supply device 10b can at least achieve the same function as the power supply device 10.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any person skilled in the art can make various changes and refinements without departing from the spirit and scope of the present creation. The scope is subject to the definition of the scope of the patent application.

Claims (14)

A power supply device having a fan full-speed operation switch, receiving an AC mains power and generating an output voltage, the power supply device having a fan full-speed operation switch includes: a transformer comprising a main winding and a primary winding separated from each other An auxiliary winding; a rectifier electrically connected to the AC mains and the main winding; a power switch electrically connected to the main winding; and a main controller electrically connected to the power switch to control the power switch in an on state and a cutoff Switching between devices; an output rectification and filter electrically connected to the secondary winding and rectifying and filtering a voltage electromagnetically coupled to the secondary winding to generate the output voltage; a fan control unit including a switch And a fan disposed between the auxiliary winding and the fan, the fan receiving the auxiliary winding to provide an auxiliary voltage for full speed rotation when the switch is closed. The power supply device of claim 1, wherein the fan control unit further comprises a driver connected in parallel with the switch, and when the switch is turned on, the fan receives the drive to provide One of the pulse width modulation signals performs a non-full speed rotation. A power supply device having a fan full speed operation switch according to claim 2, wherein the main controller and the driver are electrically connected to the auxiliary winding to receive the auxiliary voltage as an operating voltage. The power supply device of the present invention, wherein the fan control unit further includes: a first diode, disposed between the switch and the fan; a second diode is electrically connected between the fan and the DC voltage. The level of the DC voltage is lower than the level of the auxiliary voltage provided by the auxiliary winding. When the switch is turned on, the fan is accepted. The DC voltage of the second diode is rotated at a non-full speed. The power supply device of the fourth aspect of the present invention, wherein the anode of the first diode is electrically connected to the switch, and the cathode of the first diode is electrically connected to the fan. The anode of the second diode is electrically connected to the DC voltage, and the cathode of the second diode is electrically connected to the fan. The power supply device of claim 4, wherein the fan control unit further comprises: a first resistor electrically connected to the auxiliary winding to receive the auxiliary voltage; And a second resistor connected in series with the first resistor, wherein the second diode is electrically connected to a junction between the first resistor and the second resistor to receive the auxiliary voltage, The first resistor and the second resistor cooperate to provide the DC voltage. The power supply device with the fan full-speed operation switch according to claim 6 further includes an isolation feedback unit electrically connected to the output rectification filter and the main controller to be related to the output voltage. The message is fed back to the main controller. A power supply device having a fan full-speed operation switching switch according to claim 7, wherein the switch is turned on and the fan is operated in an opposite logic when the switch is closed. A power supply device having a fan full speed operation switch according to claim 7, wherein the switch is turned on and the fan is in the same logic operation when the switch is closed. A power supply device having a fan full-speed operation switch, receiving an AC mains power and generating an output voltage, the power supply device having a fan full-speed operation switch includes: a transformer comprising a main winding, a primary winding and an auxiliary winding isolated from each other; a rectifier electrically connected to the AC mains and the main winding; a power switch electrically connected to the main winding; a main controller, the electric Connected to the power switch to control switching of the power switch between an on state and a cutoff device; an output rectification and filter electrically connected to the secondary winding and rectifying and filtering a voltage electromagnetically coupled to the secondary winding The fan control unit includes: a driver electrically connected to the auxiliary winding to receive an auxiliary voltage; and a switch electrically connected to the driver; and a fan having an internal equivalent resistance, One end of the internal equivalent resistor is electrically connected to the auxiliary winding to receive the auxiliary voltage, and the other end of the internal equivalent resistor is electrically connected to one end of the switch that is not connected to the driver, wherein the fan is in the switch When it is turned on, it rotates at full speed and performs non-full speed when the switch is closed. The wind according to claim 10, wherein the wind has a power supply device for a fan full-speed operation switch, wherein the internal equivalent resistance is increased when the switch is opened to cause the fan to rotate at full speed, and the switch is lowered when the switch is closed. The fan is rotated at a non-full speed. The power supply device having the fan full speed operation switch according to claim 11 further includes an isolation feedback unit electrically connected to the output rectification filter and the main controller to be related to the output voltage. The message is fed back to the main controller. A power supply device having a fan full speed operation switch according to claim 12, wherein the switch is turned on and the fan is in a reverse logic operation when the switch is closed. A power supply device having a fan full speed operation switch according to claim 12, wherein the switch is turned on and the fan is in the same logic operation when the switch is closed.