Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
  • H02M3/00—Conversion of dc power input into dc power output
  • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
  • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
  • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
  • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
  • H02M1/00—Details of apparatus for conversion
  • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
  • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
  • H02M3/00—Conversion of dc power input into dc power output
  • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
  • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
  • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
  • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
  • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
  • H02M1/00—Details of apparatus for conversion
  • H02M1/0003—Details of control, feedback or regulation circuits
  • H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
  • H02M1/00—Details of apparatus for conversion
  • H02M1/0003—Details of control, feedback or regulation circuits
  • H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
  • H02M1/00—Details of apparatus for conversion
  • H02M1/0083—Converters characterised by their input or output configuration
  • H02M1/0093—Converters characterised by their input or output configuration wherein the output is created by adding a regulated voltage to or subtracting it from an unregulated input
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
  • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
  • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

• the invention relates to a method and a device for reducing the standby losses in the standby mode in the low-voltage generation, in particular in the low-voltage generation with a voltage converter.
• the method relates in particular to power supplies without a galvanic separation.
• voltage converter here refers in particular to a down converter, but may also be any other type of converter which serves to adapt the output voltage for the device to be supplied, in particular other power supplies connected to the mains.
• Electric voltage transformers are nowadays used in numerous devices for supplying the main device function and any standby functions.
• the power supply of various electrical appliances is often done, for reasons of cost, with a single voltage converter, which takes over the supply for both the normal operation of the device as well as for a possible stand-by operation.
• the standby mode or standby mode (also called waiting mode) is the state of a technical device in which the actual utility function is temporarily disabled or simply not needed, but can be reactivated at any time and without preparation or longer waiting times.
• for holding the standby state usually only a certain, compared to the Normal operation reduced power requirement required. Due to the great difference between the energy and power consumption of a device in these two operating states and the need to provide the full required for normal operation power as soon as possible, prevail in standby mode, the energy losses for the operation of the voltage converter that for the actual Standby function required performance regularly.
• a common approach to reducing standby losses is to switch between a main supply and a standby supply.
• the main low-voltage supply is deactivated by a microcontroller or another circuit upon detection of the standby request.
• the main low-voltage supply is deactivated by a microcontroller or another circuit upon detection of the standby request.
• a microcontroller or another circuit upon detection of the standby request.
• only a small portion of the electronics are powered to detect the request for active operation and to re-enable the main low-voltage supply.
• an additional circuit part or other circuit components are necessary to ensure the supply in standby mode.
• Another variant for reducing standby losses is the disconnection of the low-voltage supply from the outside.
• a higher-level control unit is given the opportunity, by means of a set and reset signal, to put the electronic unit into the sleep mode. In this case, the supply is completely disabled, so a mimiale power consumption can be achieved. It only leads the self-consumption of the switching regulator to energy losses.
• the disadvantage of this solution is that the higher-level control unit must make the shutdown and the activation. This control must be integrated into the concept.
• galvanic isolation is required in safe applications, which in turn would drive up the cost of such a solution.
• a concept is known in which a power circuit having a power switch of a main body of a set of the electrical apparatus connected to a first side of an AC power supply and a power transmission controller of the main body of the set is provided with a power supply second side of the AC power supply is connected to a standby power redundancy circuit in which a "power on / off" by means of a remote control is activated, the circuit receives AC power through a Reaktanzvoriques, receives remote control data from the remote control, a dedicated dedicated microcomputer for control of ON / OFF of the power switch by a switch driving unit connects to a first side of the AC power supply and then drives only the dedicated microcomputer in the standby state, in the event that the power switch is turned off and the Hauptkörpe r of the set is switched off.
• the invention is therefore an object of the invention overcome above-mentioned disadvantages and to provide a solution in which the system-specific power loss during standby operation of a low-voltage supply is significantly reduced as such and in the preferably also a safe operation of the device, such as. B. an EC motor is given.
• a first starting point for the development of the present invention is the recognition that the losses in standby mode essentially result from the self-consumption of the switching regulator as well as the supply of the electronic components in the circuit of a low-voltage supply with switching regulator.
• the electronics supply is provided from the VCC voltage via a linear regulator. generated voltage. The difference between these two voltages is converted into heat loss in the switching regulator and is therefore decisive for the power loss in standby mode.
• a basic idea now is to provide a circuit with which it is possible to reduce the output voltage in the standby state, without generating significant additional costs.
• the circuit according to the invention makes it possible in a simple manner to switch over the output voltages of the low-voltage generation from a normal mode to a standby mode.
• a circuit arrangement for low-voltage generation with a voltage switching between a supply voltage VCC at a tap for normal operation and a lower supply voltage VCC for a standby mode of a device such.
• an EC motor wherein the circuit arrangement is formed with a switching regulator which provides a setpoint voltage U so n at a defined connection point of the circuit arrangement and at this connection point 10 a Zener diode and a transistor are connected and connected in parallel to one another so that the lower supply voltage VCC for the standby mode can be realized by driving the transistor T3 to short-circuit the Zener diode and thereby apply the lower supply voltage VCC for the standby mode to said voltage tap.
• a supply voltage VCC to be present in the standby mode at the voltage tap, which is formed from the sum of the setpoint voltage U SO II and the saturation voltage VUCE_SAT of the transistor T3.
• a supply voltage VCC is applied, which is formed from the sum of the setpoint voltage U S0 n and the voltage of the Zener diode ZI.
• the switching regulator with a predetermined set value voltage U n_ so S p is formed at the feedback pin and the target voltage U so the circuit arrangement n by the voltage at the feedback pin is achieved by means of a setpoint input of the switching regulator.
• the o.g. Switching solution provided to use a Zener diode in the circuit path, which is bridged with a transistor.
• the setpoint specification of the voltage of the switching regulator takes place in an advantageous manner by the voltage at the feedback pin of the switching regulator. If this voltage exceeds a certain threshold value and thereby flows a minimum current of Ln into the feedback pin, the switching regulator stops the clocking until this threshold value is fallen below again.
• a voltage divider is provided, whereby the devisregelnde voltage can be selectively adjusted to the Zener diode via the voltage divider.
• this voltage divider is designed so that a specific nominal voltage of the voltage regulator is applied to the anode terminal of the zener diode. According to the invention, it is further provided that in the active state of
• Low-voltage circuit of the diode connected in parallel to the transistor is not driven, so that the transistor is in the off state. This means that the current does not flow through the transistor but through the zener diode.
• the voltage at VCC must be a voltage higher by the value of the zener voltage of the zener diode.
• the zener diode is short-circuited via the transistor, whereby the potential of VCC only has to be higher by the saturation voltage of the transistor VUCE_SAT than the reduced reference voltage of the switching regulator. Since the saturation voltage of the transistor is significantly lower, a lower voltage VCC is established at the voltage tap for the supply voltage VCC.
• zener diode is suitable to be chosen so that the following conditions result:
• VCC U so n + VUCE_SAT
• VCC supply voltage at the output of the circuit
• VUCE_SAT saturation voltage of the transistor VUCE_SAT saturation voltage of the transistor.
• the switching can be performed by a microcontroller as soon as the request for the standby mode takes place via the microcontroller interface.
• Another aspect of the present invention relates to the safe state of the device, preferably an EC motor by saving a separate circuit part.
• shutdown paths are provided for this purpose, which enable the safety controller to put the motor in a safe state.
• driver modules also exist in which this reduced voltage range represents an impermissible operating state.
• the circuit used must be extended by a transistor that can switch the supply voltage of the driver to 0V.
• the bridge transistors can not be driven in principle because at 0V no current flow through the transistor is possible.
• the corresponding variant is also selected, since the other one represents an impermissible operating mode in which damage can occur during operation.
• Fig. 1 shows an embodiment of an electrical circuit for
• Fig. 1a shows an alternative embodiment of an electrical circuit for low-voltage generation
• Fig. 2 shows a circuit arrangement of a bridge control.
• FIG. 1 shows an exemplary embodiment of an electrical circuit arrangement 1 for low-voltage generation with a voltage changeover of a supply voltage VCC between a normal mode and a standby mode.
• the circuit arrangement 1 is formed with a switching regulator 2 (here also marked IC1) with a predetermined setpoint voltage U SO II_SP in order to provide a supply voltage VCC of 15V DC at the output and indeed at the tap 11, the circuit arrangement 1 for normal operation.
• a switching regulator 2 here also marked IC1
• U SO II_SP predetermined setpoint voltage
• the switching regulator 2 also has the connections BPA CC, S and D, as well as the feedback pin FB. Terminal D serves as input for an input voltage.
• the switching regulator 2 is designed as a down converter and converts the input voltage of 325 V into an output voltage in the normal operation of 15V.
• this supply voltage VCC 15V DC for the Normal operation ready.
• the feedback pin FP is connected via a voltage divider comprising the resistors R1 / R2 to the anode terminal A of the Zener diode Z1.
• anode terminal Z1 and the cathode terminal of the Zener diode Z1 of the transistor T3 are connected in parallel to the anode terminal A, while the gate G of the transistor is driven by a transistor T1 via a standby control signal.
• the transistor T3 In normal operation, the transistor T3 is not activated. Thus, the current must flow through the Zener diode Z1 in normal operation.
• the Zener diode Z1 is short-circuited via the transistor T3 by the gate G of the transistor T3 is driven. Since the voltage at point 10 of the circuit is 5V and the voltage at tap 11 is now increased only by the voltage value of the saturation voltage VUCE_SAT of 0.3V of transistor T3, the voltage VCC at attack 11 is now 5.3V. Thus, the reduced supply voltage in standby mode is about 35% of the supply voltage in normal operation. As a result, a power reduction in the exemplary embodiment with a circuit topology according to FIG. 1 is achieved from approximately 650 mW to approximately 150 mW in standby mode.
• FIG. 1 a shows an alternative circuit with respect to FIG.
• FIG. 2 shows a bridge circuit 20, namely an H-bridge circuit.
• the bridge circuit 20 is supplied by the previously explained supply voltage VCC.
• the bridge circuit 20 has two driver chips IC5 and IC6, as well as four power transistors T
• To the driver chips IC5 and IC6 respectively lead control lines 21, 22 to the terminals HIN and LIN. Furthermore, the driver blocks on the terminals GND, VCC, VB, HO, VS and LO.
• the undervoltage detection of the bridge drivers IC5 and IC6 responds and deactivates the driving of the power transistors TL.
• the power transistors T L are activated with the reduced supply voltage VCC of 5.3V. Since the power transistors TL are in the saturation region at this voltage, a high power loss is implemented in the respective power transistors TL, which leads to the destruction of the power transistor TL and thus ultimately to a safe state.
• the invention is not limited in its execution to the preferred embodiments specified above , Rather, a number of variants is conceivable, which makes use of the illustrated solution even with fundamentally different types of use.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Dc-Dc Converters (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=61274240

Family Applications (1)

Country Status (4)

Citations (3)

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• 2017
  • 2017-02-22 DE DE102017103655.5A patent/DE102017103655A1/de active Pending
• 2018
  • 2018-02-19 EP EP18706994.3A patent/EP3586435A1/de active Pending
  • 2018-02-19 WO PCT/EP2018/054022 patent/WO2018153810A1/de unknown
  • 2018-02-19 CN CN201890000539.9U patent/CN211481151U/zh active Active

Patent Citations (3)

Non-Patent Citations (1)

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