TW201415054A - A DC power source test system with energy recycle - Google Patents

Abstract

To enable a DC Power Source to generate variable output values in a constant output current model under testing, an electronic load (electronic load that can be programmed and controlled) was connected to the output terminal. Thus, the resulting output power is discharged as heat that cannot be recovered. In addition, to ensure proper functions of the test machine (test room), installing a cooling device was necessary, thereby causing multiple power losses. A traditional DC/DC converter cannot operate under a constant current input with variable values (especially with PWM control topology). The purpose of this invention is to develop a DC/DC converter that can provide a constant current input with variable values, with the input terminal connected to the output terminal of the DC Power Source and the output terminal connected to a traditional DC/DC converter (or DC/AC converter) during testing. The converted DC (or AC) fed back to the DC power supply system (or AC power supply system), or the energy storage system, load. Thus, the electrical energy generated from the constant current output when testing the DC Power Source was partially recovered, achieving the energy-saving objective.

Description

DC power supply test system with electric energy recovery

One of the technical features of the present invention is to integrate circuit analysis and design in electronics and power electronics, and to recycle and reuse the output power of the DC power source to be tested for constant current output, and feed it back to the AC or DC power supply system or Storage or use, the effect of which can improve the conventional discharge of waste electrical energy.

The electric energy recovery during the test of the DC power supply to be tested is very popular at present, and there are many related papers and patents. At present, the most common way is to connect DC/DC converter, DC/AC converter (or a combination of the two) to the DC power output to replace the electronic load and recover the energy. .

However, the input terminals of traditional DC/DC converters and DC/AC converters are voltage inputs and cannot work with constant current input. Therefore, the DC power supply to be tested must be operated at constant current output. When testing, it is impossible to achieve electrical energy recovery.

Referring to the conventional electric energy recovery technology of FIG. 1, the DC power supply 11 to be tested is connected to a DC/DC converter 12, a DC/AC converter 13, and the converted DC power and AC are converted. The electric power is sent to the DC terminal load 14 and the AC terminal load 15.

Since the general direct current/direct current (DC/DC) converter 12 and the direct current/alternating current (DC/AC) converter 13 are not operable at the constant current input. Therefore, when the DC power source to be tested is being tested for constant current output, the power recovery function cannot be completed.

The DC terminal load 14 can be a DC power supply system, an energy storage system, and the like, and the AC terminal load 15 can be an AC power supply system, an energy storage system, and the like.

One of the main technical features of the present invention, please refer to FIG. 2 first, the input end of the constant current input converter 22 is connected to the DC power source 21 to be tested, to achieve the purpose of the DC current constant current output test, and the converted floating direct current, It is sent to a DC/DC converter 23, a DC/AC converter 24, to be converted into a stable DC power, AC power, and then sent to a DC terminal load 25 and an AC terminal load 26 to complete the power. Recycling purposes.

The plurality of sets of input/output terminals of the monitoring system 27 are also respectively connected to the DC power source 21 to be tested, a DC/DC converter 23, a DC/AC converter 24, a DC terminal load 25, The AC terminal load 26 uses the interface circuit to read related data such as voltage, current, temperature, etc., and appropriately sends out the required control signals in time to facilitate the smooth operation of the system in the set mode.

Referring again to FIG. 5, the interface circuit 51 is connected to the active device Q 53 and the resistor R _e 52 to generate a voltage V _re , so the current (Active component Q 53 needs to work in the work area, and I _c >> I _b ). The currents i _cc , i _dc , i _ac are floating, but the sum is fixed and the magnitude is equal to the current I _c . Because the current I _c = I _dc , the DC power supply V _dc 57 to be tested outputs a fixed DC current to achieve its constant current output test purpose. The double-ended equivalent part of the resistor and capacitor combination Z _cc 54 has a floating DC voltage at both ends, which is converted by a DC/DC converter 55 and a DC/AC converter 56 to deliver a stable The direct current and the alternating current are connected to the DC terminal load 59 and the AC terminal load 510 to complete the power recovery.

The DC terminal load is also a DC electrical device, which can be the DC power supply system or other energy storage system and application system of the test system.

The AC terminal load is also an AC electrical device, which can be an AC power supply system or other energy storage system or application system of the test system.

As shown in Figure 6, the DC power supply to be tested can be a single DC power supply or a series combination of multiple independent DC power supplies to increase the flexibility and efficiency of the test system.

Refer to the design shown in Figure 3 for the resistive load structure of the DC power supply constant current output circuit of one of the main technical features of the present invention. According to the conventional electronics theory, when the active device Q 32 is in the working area and the active device Q is an active component such as a BJT or a MOSFET, the output current I _{dc of the} DC power supply V _dc 35 must be equal to I _c and approximately V _re / R _{e .} The value does not change with the change of V _dc 35 and resistance R _L 34. Therefore, the DC power supply will output a fixed current, which is about V _re / R _e , and V _re is controllable. The external interface circuit 31 can be utilized to achieve this effect.

Another technical feature of the present invention is the design of the impedance load structure related to the DC source constant current output circuit. Please refer to FIG. 4 for the invention and refer to FIG. Among them, R _L 34 is replaced by a double-end equivalent part Z _L 44 which is a combination of a resistor and a capacitor. When the active device Q 42 is in the working area, the active device Q is an active component such as a BJT or a MOSFET, and the output current I _{dc of the} DC power supply V _dc 45 must be equal to I _c and is approximately V _re / R _e , and does not As V _dc 45, Z _L 44 change in size, the DC power supply will output a fixed current of approximately V _re / R _e . V _re is controllable and its size can be designed using external interface circuitry 41 to achieve this.

Another technical feature of the present invention is the product designed by using the constant current input converter, which is used for power recovery during DC power supply constant current output test.

For the concept of electrical energy recovery and the theoretical structure of the DC current constant current output test of the present invention, please refer to FIG. 5 and FIG. 6 in the embodiment, and refer to FIG. According to the electronic circuit design theory, Z _L is a double-ended equivalent part Z _cc 54 composed of a resistor and a capacitor, a DC/DC converter, a DC/AC converter, etc. The circuit is as shown in Figure 9.

The DC power source V _dc 57 to be tested, that is, the DC power source V _dc 61 to be tested as shown in FIG. 6 may be a single DC power source V _{dc 1} 611 or a combination of multiple sets of DC power sources V _{dc n} 61n.

The plurality of sets of input/output terminals of the monitoring system 58 are also connected to the interface circuit 51, the DC/DC converter 55, the DC/AC converter 56, and the active component Q 53, respectively. Take relevant data, current, temperature and other data parameters, and timely send out the required control signals to facilitate the smooth operation of the system in the set mode.

The monitoring system 58 is regulated by the interface circuit 51 to generate the required V _re , and the DC power supply is regulated to output current. Moreover, the size of the DC terminal load 59 and the AC terminal load 510 are not changed.

In addition, the monitoring system 58 reads the resistors and capacitors of the related interface circuit to form a double-ended equivalent part Z _cc 54, a DC/DC converter 55, DC/AC (DC/ The AC) converter 56 and other voltage and current related information are regulated to produce the desired V _re magnitude to ensure that the active component Q 710 is in the working area.

A DC/DC converter 55 delivers the converted DC to a DC termination load 59.

A DC/AC converter 56 delivers the converted AC to the AC terminal load 510.

Another embodiment of the present invention, which is specifically shown in the above technical features, is shown in FIG. 7 and FIG. 8 , and please refer to FIG. 5 and FIG. 6 . Wherein Z _cc 54 is replaced by a combination of capacitor C _c 74 and resistor R _c 75. The DC power supply V _dc 57 to be tested is replaced by the battery pack V _BT 76. The battery pack V _BT 76 can be a single battery or a combination of multiple battery packs. For the combination and monitoring method, please refer to FIG.

The plurality of sets of input/output terminals of the monitoring system 711 are also respectively connected to the interface circuit 71, the DC/DC converter 78, the DC/AC converter 710, and the active component Q 713 for reading. Take relevant data, current, temperature and other data parameters, and timely send out the required control signals to facilitate the smooth operation of the system in the set mode.

Capacitor C _c 74 and resistor R _c 75 are a floating DC voltage, which is converted into a stable direct current and alternating current by a direct current/direct current (DC/DC) converter 78 and a direct current/alternating current (DC/AC) converter 710. It is used by the DC terminal load 711 and the AC terminal load 712. The current i _dc and the current i _ac are floating due to the magnitude of the load.

Z _L ‧‧‧Resistors and capacitors (loads)

Z _cc ‧‧‧Resistors and capacitors

R _e , R _L , R _c ‧‧‧resistance

C _c ‧‧‧ capacitor

V _dc ‧‧‧DC power supply (DC power supply to be tested)

V _re ‧‧‧ R _e voltage across

V _BT ‧‧‧Battery (battery to be tested)

Q ‧‧‧Active components (BJT, MOSFET, ,, etc.)

I _e , I _c , I _b ‧‧‧ current

I _dc , I _BT ‧‧‧ current

i _cc , i _dc , i _ac ‧‧‧ current

Figure 1 Conventional DC power supply recovery architecture

Figure 2 Energy recovery architecture for constant current output of DC power supply to be tested according to the present invention

Figure 3 DC power supply constant current output circuit (resistive load)

Figure 4 DC power supply constant current output circuit (impedance load)

Figure 5 Circuit structure of an embodiment of the present invention

Figure 6 The power supply combination to be tested according to the present invention

Figure 7 Circuit architecture of a specific embodiment of the present invention

Figure 8 Battery combination and monitoring of the invention to be tested

Figure 9 Load equivalent of the present invention

51‧‧‧Interface circuit

52‧‧‧resistance

53‧‧‧Active component Q

54‧‧‧Double-end equivalent part of resistor and capacitor combination Z _cc

55‧‧‧DC/DC converter

56‧‧‧DC/AC (DC/AC) converter

57‧‧‧DC power supply (to be tested)

58‧‧‧Monitoring system

59‧‧‧DC terminal load

510‧‧‧AC terminal load

Claims (10)

A DC power supply test system with electric energy recovery, comprising: a constant current input converter, the input end of which is connected to the output end of the DC power supply to be tested, and is used for outputting a set constant current, and the output end is connected to the direct current /DC (DC/DC) converter; DC/DC converter for converting the floating DC voltage of the constant current input converter output into a stable DC output for supply; DC terminal load, Connect to the output of the DC/DC converter and convert the electrical energy to the final application site; the monitoring system is connected to the above units through the interface circuit, and reads the relevant data parameters, and the following control signals are obtained. To make the power converter system stable. A DC power supply test system with electric energy recovery, comprising: a constant current input converter, the input end of which is connected to the output end of the DC power supply to be tested, and is used for outputting a set constant current, and the output end is connected to the direct current /AC (AC/AC) converter; DC/AC converter for converting the floating DC voltage of the constant current input converter output into a stable DC output for supply; DC terminal load, Connect to the output of the DC/AC converter and convert the electrical energy to the final application site; the monitoring system is connected to the above units through the interface circuit, and reads the relevant data parameters, and the following control signals are obtained. To make the power converter system stable. The DC power supply test system with electric energy recovery as described in claim 1 or 2, wherein the input end of the constant current input converter is connected to the output end of the DC power supply, and the output end is connected to the DC/DC (DC/DC). The input of a converter or DC/AC converter, these units are monitored by the monitoring system via the interface circuitry. The DC power supply test system with electric energy recovery according to claim 1 or 2, wherein the internal circuit of the constant current input converter comprises an active component including a BJT, a MOSFET and the like. The DC power supply test system with electric energy recovery as described in claim 1 or 2, wherein the internal circuit of the constant current input converter comprises a double-end equivalent component of a combination of a resistor and a capacitor, wherein one end and the active component are used. Docked. The DC power supply test system with electric energy recovery according to claim 1 or 2, wherein the internal circuit of the constant current input converter comprises a resistor part and is connected to one end of the active element. The DC power supply test system with power recovery as described in claim 1 or 2, wherein the internal circuit of the constant current input converter comprises an interface circuit that is connected to the active component control terminal. A DC power supply test system with power recovery as described in claim 1 or 2, wherein a DC/DC converter or a DC/AC converter and a constant current input converter are used. The double-ended equivalent parts of the internal circuit are connected in parallel. The DC power supply test system with electric energy recovery as described in claim 1 or 2, wherein the DC power supply to be tested may be a single DC power supply or a series combination of a plurality of independent DC power supplies. A product designed by a power converter of a DC power supply test system with electric energy recovery according to claim 1 or 2 of the patent application, which is used for energy recovery.