Multi-path isolation power supply voltage controller

Abstract

The utility model discloses a multipath isolation power supply voltage controller, relates to the multipath power supply control technology field, and comprises a gear selection module, a control module and a power supply module which are adaptively connected, the control module comprises a plurality of control units, the power supply module comprises a plurality of power supply units, and the power supply units are connected with the gear selection module. The plurality of control units are in one-to-one correspondence with the plurality of power supply units; the gear selection module is used for selecting a target gear from a plurality of preset power supply voltage gears, the control unit comprises a plurality of switch elements, and the plurality of switch elements in the control unit are in one-to-one correspondence with the plurality of power supply voltage gears; in any control unit, the switch element corresponding to the target gear is used for controlling the corresponding power supply unit in the power supply module to output the power supply voltage corresponding to the target gear. The multipath isolation power supply voltage controller provided by the utility model can synchronously adjust the output voltage of multipath power supplies, and has the technical characteristics of high reliability, simple operation and convenient maintenance.

Description

A multi-channel isolated power supply voltage controller Technical Field

[0001] This utility model relates to the field of multi-channel power supply control technology, and in particular to a multi-channel isolated power supply voltage controller. Background Technology

[0002] Traditional methods for adjusting power supply voltage include: (1) using a microcontroller to program and adjust the output duty cycle to set the feedback pin of the power chip to adjust the output voltage. (2) using a microcontroller to control a digitally adjustable resistor and program the feedback resistor of the power chip to change its resistance value to adjust the output voltage. (3) connecting one or more resistors in parallel with the feedback resistor of the power chip, and adjusting the output voltage by selecting the resistor value through a controller. (4) connecting an adjustable resistor in parallel with the feedback resistor of the power chip, and adjusting the output voltage by manually adjusting the resistance value of the resistor to change its feedback resistance value.

[0003] The above methods for adjusting power supply voltage are designed for single-channel power supply voltage and cannot simultaneously regulate the voltage of multiple isolated power supplies. Furthermore, using a controller for adjustment poses a risk of control signal failure and poor stability in environments with severe electromagnetic interference. The controller incorporates numerous detection, feedback, and protection circuits, resulting in a complex circuit structure and making maintenance difficult. In addition, these adjustment methods also suffer from unstable output voltage, large fluctuations, and low accuracy. Summary of the Invention

[0004] In response to the aforementioned problems and technical requirements, the applicant has proposed a method.

[0005] The technical solution of this utility model is as follows:

[0006] A multi-channel isolated power supply voltage controller includes a range selection module, a control module, and a power module that are adapted and connected. The control module includes multiple control units, and the power module includes multiple power units. The multiple control units correspond one-to-one with the multiple power units.

[0007] The gear selection module is used to select a target gear from a plurality of preset power supply voltage gears. The control unit includes a plurality of switching elements, and the plurality of switching elements in the control unit correspond one-to-one with the plurality of power supply voltage gears.

[0008] In any control unit, the switching element corresponding to the target gear is used to control the power supply unit in the power supply module to output the power supply voltage corresponding to the target gear.

[0009] A further technical solution is that the gear selection module includes a multi-gear adjustable rotary switch U1, which includes a power pin and multiple gear pins. The power pin of the multi-gear adjustable rotary switch U1 is connected to the input power voltage of the rotary switch.

[0010] A further technical solution is that the multiple switching elements in any control unit are connected one-to-one with multiple gear pins;

[0011] The switching element in any control unit is also connected to the corresponding power supply unit.

[0012] The further technical solution is that the power supply unit includes a power chip, a fixed resistor, and multiple adjustable resistors;

[0013] The plurality of adjustable resistors correspond one-to-one with the plurality of power supply voltage levels. The adjustment terminal of the power chip is connected to analog ground through a fixed resistor, and one end of each of the plurality of adjustable resistors is connected to the adjustment terminal of the power chip.

[0014] A further technical solution is that the power supply unit further includes a first resistor, a first capacitor, a second capacitor, and a third capacitor. The input terminal of the power supply chip is connected to the input power supply voltage and is connected to analog ground through the third capacitor.

[0015] The output terminal of the power chip is connected to one end of a fixed resistor and one end of a plurality of adjustable resistors through a first resistor. The output terminal of the power chip is connected to analog ground through a first capacitor, and the second capacitor is connected in parallel with the first capacitor.

[0016] A further technical solution is that the switching element includes a relay, and the positive terminals of the coils of multiple relays are connected one-to-one with the multiple position pins of the multi-position adjustable rotary switch.

[0017] For any power supply unit, the other end of multiple regulating resistors is connected one-to-one with the common terminal of multiple relays in the corresponding control unit.

[0018] A further technical solution is that, for any relay, the normally open terminal of the relay is connected to analog ground, and the negative terminal of the relay coil is grounded.

[0019] A further technical solution is that the power chip U2 includes the model LM317DCYR.

[0020] The beneficial technical effects of this utility model are:

[0021] (1) It can realize synchronous voltage regulation of multiple isolated power supplies by using a single multi-level adjustable rotary switch. The circuit structure is simple and easy to use.

[0022] (2) The resistance value is not controlled by the resistor. Instead, the corresponding resistance value is selected by the relay and connected to the power chip adjustment terminal. This avoids the uncertainty caused by external influences on the controller. At the same time, it also avoids setting up a large number of detection feedback and protection circuits required for the controller, which facilitates maintenance and reduces costs.

[0023] (3) The output voltage and accuracy of the power supply depend on the resistance value and accuracy of the regulating resistor. The regulating resistor is a fixed resistor, which is less affected by external factors and has a more stable and accurate output voltage. Attached Figure Description

[0024] Figure 1 is a structural block diagram of an embodiment of the multi-channel isolated power supply voltage controller provided by this utility model.

[0025] Figure 2 is a schematic diagram of one embodiment of the multi-position adjustable rotary switch provided by this utility model.

[0026] Figure 3 is a schematic diagram of an embodiment of the power supply unit 1 provided by this utility model.

[0027] Figure 4 is a schematic diagram of an embodiment of the power supply unit 2 provided by this utility model.

[0028] Figure 5 is a schematic diagram of the relay K1 provided by this utility model.

[0029] Figure 6 is a schematic diagram of the relay K2 provided by this utility model.

[0030] Figure 7 is a schematic diagram of the relay K3 provided by this utility model.

[0031] Figure 8 is a schematic diagram of the relay K4 provided by this utility model.

[0032] Figure 9 is a schematic diagram of the relay K5 provided by this utility model.

[0033] Figure 10 is a schematic diagram of the relay K6 provided by this utility model. Detailed Implementation

[0034] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this disclosure.

[0035] This utility model provides a multi-channel isolated power supply voltage controller, mainly used in scenarios requiring synchronous adjustment of the voltages of multiple isolated power supplies, with the aim of simultaneously regulating the output voltages of multiple isolated power supplies. The multi-channel isolated power supply voltage controller includes an adapter-connected range selection module, a control module, and a power supply module. The control module includes multiple control units, and the power supply module includes multiple power supply units, with each control unit corresponding to one of the power supply units.

[0036] The gear selection module is used to select a target gear from a plurality of preset power supply voltage gears. The control unit includes a plurality of switching elements, and the plurality of switching elements in the control unit correspond one-to-one with the plurality of power supply voltage gears.

[0037] In any control unit, the switching element corresponding to the target gear is used to control the power supply unit in the power supply module to output the power supply voltage corresponding to the target gear.

[0038] As shown in Figure 1, specifically, the gear selection module is connected to the control module, and the control module is connected to the power supply module. It can be understood that each power supply voltage level corresponds to a specific power supply voltage. The target gear is selected through the gear selection unit, i.e., the desired output power supply voltage is selected. After the target gear is selected, the switching elements corresponding to the target gear in all control units activate, causing all power supply units to output the power supply voltage corresponding to the target gear. In other words, it is possible to simultaneously control the power supply voltage output by all power supply units, ensuring that multiple power supply units output the desired power supply voltage. The specific structures of the gear selection module, control unit, and power supply units are described below, as is the specific working principle of the control unit controlling the power supply unit.

[0039] Furthermore, the gear selection module can be a multi-gear adjustable rotary switch. The multi-gear adjustable rotary switch U1 has multiple gear pins. The power supply pins of the multi-gear adjustable rotary switch U1 are connected to the power supply voltage VCC, i.e., the input power supply voltage of the rotary switch. Each gear pin corresponds to a power supply voltage level. It should be noted that, in specific implementations, the number of gear pins of the multi-gear adjustable rotary switch U1 refers to the actual number of gear pins used, excluding unconnected gear pins.

[0040] As an example, this embodiment sets three power voltage levels, defined as level 1, level 2, and level 3, corresponding to power voltage 1, power voltage 2, and power voltage 3, respectively. Correspondingly, as shown in Figure 2, the multi-level adjustable rotary switch U1 used in this embodiment has six available pins, but only three (pins 1-3) are used, while pins 4-6 are left unconnected. Pins 1-3 correspond to levels 1-3 respectively; the power voltage level can be selected by rotating the rotary switch.

[0041] Furthermore, the multiple power supply units have the same structure. Each power supply unit includes a power chip, a fixed resistor, and multiple adjustable resistors. The multiple adjustable resistors correspond one-to-one with multiple power supply voltage levels. The adjustment terminal of the power chip is connected to analog ground through the fixed resistor, and one end of each of the multiple adjustable resistors is connected to the adjustment terminal of the power chip.

[0042] The power supply unit also includes a first resistor, a first capacitor, a second capacitor, and a third capacitor. The input terminal of the power chip is connected to the input power supply voltage and is connected to analog ground through the third capacitor.

[0043] The output terminal of the power chip is connected to one end of a fixed resistor and one end of a plurality of adjustable resistors through a first resistor. The output terminal of the power chip is connected to analog ground through a first capacitor, and the second capacitor is connected in parallel with the first capacitor.

[0044] The multiple adjustable resistors correspond one-to-one with multiple power supply voltage levels. The resistance values ​​of the multiple adjustable resistors are different. Specifically, the resistance value of each adjustable resistor corresponds to a power supply voltage level.

[0045] As shown in Figures 3 and 4, this embodiment includes two power supply units, defined as power supply unit 1 and power supply unit 2. In actual implementation, the number of power supply units in the power module can be set according to specific application requirements.

[0046] In this embodiment, corresponding to the three power supply voltage levels, each power supply unit has three adjustable resistors with different resistance values. For power supply unit 1, the three adjustable resistors are resistors R1, R2, and R3. For power supply unit 2, the three adjustable resistors are resistors R8, R9, and R10. Resistors R1-R3 correspond to voltage levels 1-3, and resistors R8-R10 correspond to voltage levels 1-3, respectively. The power chip model can be LM317DCYR. ​​As shown in Figures 3-4, the OUTPUT and OUTPUT / 2 terminals of power chips U2 / U3 are connected to form the output terminal, the INPUT terminal of power chips U2 / U3 is the input terminal, and the ADJUST terminal of power chips U2 / U3 is the adjustment terminal.

[0047] Specifically, in power supply unit 1, the fixed resistor, the first resistor, the first capacitor, the second capacitor, and the third capacitor are represented as resistor RADJ, resistor R0, capacitor C2, capacitor C3, and capacitor C4, respectively. The input terminal of power chip U2 is connected to analog ground through capacitor C4 and connected to the power supply voltage VDD. One end of resistors R1, R2, and R3 is connected to the ADJUST terminal of power chip U2. The ADJUST terminal of power chip U2 is also connected to analog ground through resistor RADJ. One end of resistor RADJ is connected to one end of resistors R1, R2, and R3, as well as one end of resistor R0. The other end of resistor R0 is connected to the OUTPUT and OUTPUT / 2 terminals of power chip U2. The OUTPUT and OUTPUT / 2 terminals of power chip U2 are connected to analog ground through capacitor C2. Capacitor C3 is connected in parallel with capacitor C2. The OUTPUT and OUTPUT / 2 terminals of power chip U2 output the power supply voltage VDD1.

[0048] In power supply unit 2, the fixed resistor, the first resistor, the first capacitor, the second capacitor, and the third capacitor are represented as resistor RADJ1, resistor R7, capacitor C5, capacitor C6, and capacitor C7, respectively. The input terminal of power chip U3 is connected to analog ground through capacitor C7 and is connected to the power supply voltage VDD-1. One end of resistors R8, R9, and R10 is connected to the ADJUST terminal of power chip U3. The ADJUST terminal of power chip U3 is also connected to analog ground through resistor RADJ1. One end of resistor RADJ1 is connected to one end of resistors R8, R9, and R10, as well as one end of resistor R7. The other end of resistor R7 is connected to the OUTPUT and OUTPUT / 2 terminals of power chip U3. The OUTPUT and OUTPUT / 2 terminals of power chip U3 are connected to analog ground through capacitor C5. Capacitor C6 is connected in parallel with capacitor C5. The OUTPUT and OUTPUT / 2 terminals of power chip U3 output the power supply voltage VDD-11.

[0049] Furthermore, in any control unit, the multiple switching elements are connected one-to-one with multiple position pins; the switching elements in any control unit are connected to the corresponding power supply unit. Specifically, the switching elements can be relays, and the positive terminals of the coils of multiple relays are connected one-to-one with the multiple position pins of the multi-position adjustable rotary switch; for any power supply unit, the other ends of multiple adjusting resistors are connected one-to-one with the common terminal of the multiple relays in the corresponding control unit. For any relay, the normally open terminal of the relay is connected to analog ground, and the negative terminal of the relay coil is grounded.

[0050] In this embodiment, corresponding to the number of power supply units, the control module has two control units, defined as control unit 1 and control unit 2. Control unit 1 corresponds to power supply unit 1, and control unit 2 corresponds to power supply unit 2. It should be noted that the analog grounds connected to different power supply units and their corresponding control units are independent of each other, so as to output multiple isolated power supply voltages.

[0051] Corresponding to the three power supply voltage levels, control unit 1 is equipped with relays K1, K2, and K3; control unit 2 is equipped with relays K4, K5, and K6. In this embodiment, relays K1-K6 are all of model G6K-2F-Y-TR DC5. This model of relay has two sets of contact groups, defined as contact group 1 and contact group 2. In this embodiment, only contact group 1 of this model of relay is used, and contact group 2 is left unconnected.

[0052] As shown in Figure 5-7, in control unit 1, the positive terminal of relay K1 coil is connected to gear position pin 1, the negative terminal of relay K1 coil is grounded, the common terminal of relay K1 contact group 1 is connected to one end of resistor R1, the normally open terminal of relay K1 contact group 1 is connected to analog ground, and the normally closed terminal of relay K1 contact group 1 is unconnected. The positive terminal of relay K2 coil is connected to gear position pin 2, the negative terminal of relay K2 coil is grounded, the common terminal of relay K2 contact group 1 is connected to one end of resistor R2, the normally open terminal of relay K2 contact group 1 is connected to analog ground, and the normally closed terminal of relay K2 contact group 1 is unconnected. The positive terminal of relay K3 coil is connected to gear position pin 1, the negative terminal of relay K3 coil is grounded, the common terminal of relay K3 contact group 1 is connected to one end of resistor R3, the normally open terminal of relay K3 contact group 1 is connected to analog ground, and the normally closed terminal of relay K3 contact group 1 is unconnected.

[0053] As shown in Figure 8-10, in control unit 2, the positive terminal of relay K4 coil is connected to gear position pin 1, the negative terminal of relay K4 coil is grounded, the common terminal of relay K4 contact group 1 is connected to one end of resistor R8, the normally open terminal of relay K4 contact group 1 is connected to analog ground, and the normally closed terminal of relay K4 contact group 1 is unconnected. The positive terminal of relay K5 coil is connected to gear position pin 2, the negative terminal of relay K5 coil is grounded, the common terminal of relay K5 contact group 1 is connected to one end of resistor R9, the normally open terminal of relay K5 contact group 1 is connected to analog ground, and the normally closed terminal of relay K5 contact group 1 is unconnected. The positive terminal of relay K6 coil is connected to gear position pin 3, the negative terminal of relay K6 coil is grounded, the common terminal of relay K6 contact group 1 is connected to one end of resistor R10, the normally open terminal of relay K6 contact group 1 is connected to analog ground, and the normally closed terminal of relay K6 contact group 1 is unconnected.

[0054] The working principle of the multi-channel isolated power supply voltage controller is explained below based on this embodiment: Taking the multi-position adjustable knob switch U1 rotated to position 1 as an example, when the multi-position adjustable knob switch U1 rotates to position 1, the multi-position adjustable knob switch U1 outputs the NET1 signal to the positive terminals of the coils of relays K1 and K4. The coils of relays K1 and K4 are energized, and the common terminal of relays K1 and K4 is closed with the normally open terminal. At this time, the signals R1-IN and R1-IN1 are grounded through the resistors R1 and R8 respectively via the relays K1 and K4. The resistors RADJ and RADJ1 of the ADJUST terminals of power chips U2 and U3 are connected in parallel with the resistors R1 and R8 respectively. The voltage of the ADJUST terminals of power chips U2 and U3 changes, and both power chips U2 and U3 output the power supply voltage 1 corresponding to position 1. That is, by changing the voltage of the ADJUST terminals of power chips U2 and U3, the output voltage of power chips U2 and U3 can be adjusted simultaneously.

[0055] In summary, the multi-channel isolated power supply voltage controller provided by this utility model can simultaneously adjust the voltage signals of the adjustment terminals of multiple power supply chips, thereby achieving the effect of synchronously adjusting the output voltage of multiple power supplies. It has the technical characteristics of high reliability, simple operation, and convenient maintenance.

[0056] In the description of this specification, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. The use of terms such as "an embodiment / mode," "example," etc., means that a specific feature, structure, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Features defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating this disclosure and are not intended to limit the scope of this disclosure. Other improvements and variations that are directly derived or conceived by those skilled in the art without departing from the spirit and concept of this utility model should be considered to be included within the protection scope of this utility model.

Claims

1. A multi-channel isolated power supply voltage controller, characterized in that, The system includes a gear selection module, a control module, and a power module for connection. The control module includes multiple control units, and the power module includes multiple power supply units, with each control unit corresponding to one of the power supply units. The gear selection module is used to select a target gear from multiple preset power supply voltage levels. Each control unit includes multiple switching elements, with each switching element corresponding to one of the power supply voltage levels. In any control unit, the switching element corresponding to the target gear level controls the corresponding power supply unit in the power module to output a power supply voltage corresponding to the target gear level.

2. The multi-channel isolated power supply voltage controller according to claim 1, characterized in that, The gear selection module includes a multi-gear adjustable rotary switch U1, which includes a power pin and multiple gear pins. The power pin of the multi-gear adjustable rotary switch U1 is connected to the input power voltage of the rotary switch.

3. The multi-channel isolated power supply voltage controller according to claim 1, characterized in that, Each control unit has multiple switching elements connected to multiple gear pins in a one-to-one correspondence; each control unit also has a switching element connected to a corresponding power supply unit.

4. The multi-channel isolated power supply voltage controller according to claim 3, characterized in that, The power supply unit includes a power chip, a fixed resistor, and multiple adjustable resistors; the multiple adjustable resistors correspond one-to-one with multiple power supply voltage levels, the adjustment terminal of the power chip is connected to analog ground through the fixed resistor, and one end of each of the multiple adjustable resistors is connected to the adjustment terminal of the power chip.

5. The multi-channel isolated power supply voltage controller according to claim 4, characterized in that, The power supply unit further includes a first resistor, a first capacitor, a second capacitor, and a third capacitor. The input terminal of the power supply chip is connected to the input power supply voltage and is connected to analog ground through the third capacitor. The output terminal of the power supply chip is connected to one end of a fixed resistor and one end of multiple adjustable resistors through the first resistor. The output terminal of the power supply chip is connected to analog ground through the first capacitor. The second capacitor is connected in parallel with the first capacitor.

6. The multi-channel isolated power supply voltage controller according to claim 4, characterized in that, The switching element includes relays, and the positive terminals of the coils of multiple relays are connected one-to-one with the pins of multiple positions of a multi-position adjustable rotary switch; for any power supply unit, the other ends of multiple regulating resistors are connected one-to-one with the common terminal of multiple relays in the corresponding control unit.

7. The multi-channel isolated power supply voltage controller according to claim 6, characterized in that, For any given relay, the normally open terminal of the relay is connected to analog ground, and the negative terminal of the relay coil is grounded.

8. The multi-channel isolated power supply voltage controller according to claim 4, characterized in that, The power chip U2 is model number LM317DCYR.

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