Pulse inverter assembly and method for operating a pulse inverter assembly

Abstract

The invention relates to a pulse inverter assembly comprising: a positive high-voltage input for supplying a positive lead; a negative high-voltage input for supplying a negative lead; a pulse inverter for providing at least one alternating voltage from a direct voltage provided via the leads; at least one resistance assembly having at least one resistance between the positive lead and the negative lead, wherein the at least one resistance assembly has at least one self-conducting semiconductor switch which is set up and arranged in such a way that an electrical connection formed by the at least one resistance assembly between the positive lead and the negative lead is closed or opened; and a control device, wherein the control device is set up to switch the at least one self-conducting semiconductor switch into the off state at least in a normal operating state. The invention also relates to a method for operating a pulse inverter assembly.

Description

Technical Field

[0001] The present invention relates to a pulse inverter assembly and a method for operating the pulse inverter assembly. Background Technology

[0002] In vehicles, especially electric vehicles, a resistive chain (Widerstandskette) is installed in parallel with the pulse inverter. The resistive chain serves the purpose of discharging the intermediate circuit capacitors connected upstream within a preset time after the upstream protector has disconnected the high-voltage battery in an emergency. Other functions of the resistive chain include protecting the intermediate circuit capacitors in overvoltage conditions and, in conjunction with this, achieving a defined time constant (e.g., τ=5RC) during charging and discharging. This behavior delays the voltage rise when the pulse occurs, giving the control software sufficient time to intervene. Summary of the Invention

[0003] The object of this invention is to create a pulse inverter assembly and a method for operating the pulse inverter assembly, wherein energy efficiency is particularly improved.

[0004] According to the present invention, this objective is achieved by a pulse inverter assembly and a method for operating the pulse inverter assembly.

[0005] In particular, a pulse inverter assembly is created, comprising: a positive high-voltage input terminal for supplying power to a positive lead; a negative high-voltage input terminal for supplying power to a negative lead; a pulse inverter for providing at least one AC voltage from a DC voltage supplied through the lead; at least one resistor assembly having at least one resistor between the positive and negative leads, wherein the at least one resistor assembly has at least one self-conducting semiconductor switch, the at least one self-conducting semiconductor switch being configured and arranged such that an electrical connection constructed by the at least one resistor assembly between the positive and negative leads is closed or opened; and a control device, wherein the control device is configured to switch the at least one self-conducting semiconductor switch to off, at least in a normal operating state.

[0006] Furthermore, a method for operating a pulse inverter assembly is provided, wherein at least one resistor assembly having at least one resistor operates between a positive lead fed by a positive high-voltage input terminal and a negative lead fed by a negative high-voltage input terminal, wherein at least one self-conducting semiconductor switch of the at least one resistor assembly is operated to close or open an electrical connection constructed between the positive and negative leads via the at least one resistor assembly, and wherein the at least one self-conducting semiconductor switch is switched off by a control device of the pulse inverter assembly, at least during normal operation.

[0007] This pulse inverter assembly and method achieve improved energy efficiency during normal operation because at least one resistor of the at least one resistor assembly is disconnected from the leads, preventing current from flowing through it. This prevents power loss. This is achieved by the resistor assembly having at least one self-conducting semiconductor switch. The at least one self-conducting semiconductor switch is used to close or open the electrical connection established between the positive and negative leads via the at least one resistor assembly. The at least one self-conducting semiconductor switch is controlled by a control device of the pulse inverter assembly. During normal operation of the pulse inverter assembly, the control device controls the at least one self-conducting semiconductor switch so that it is turned off, i.e., not conducting. Therefore, during normal operation, no power loss occurs at at least one resistor of the at least one resistor assembly. In other words, no electrical energy is converted into heat without further use. However, in the event of a fault, i.e., if the pulse inverter assembly is outside of normal operation, the control device no longer actively controls the at least one self-conducting semiconductor switch, causing it to turn on and establish an electrical connection between the positive and negative leads via the at least one resistor. Then, the at least one resistor can be used, in particular, in emergency situations, especially after the preceding protector has been disconnected from the high-voltage battery, to discharge the preceding intermediate circuit capacitor within a predetermined time. Furthermore, the at least one resistor can protect the intermediate circuit capacitor, especially in the event of overvoltage, and in particular, in conjunction with this, a defined time constant (e.g., τ = 5RC) can be set during charging and discharging. In particular, this behavior can delay the voltage rise when a pulse occurs, giving the control software sufficient time to intervene. Due to the use of a self-conducting semiconductor switch, the electrical connection is ensured even in the event of control device failure or control malfunction.

[0008] By improving energy efficiency, this pulse inverter component and method also allow for better utilization of battery charging. When used in vehicles, this can increase driving range.

[0009] The at least one resistive component may have multiple resistors, particularly in the form of a resistor chain, i.e., series resistors. For example, the resistive component may have four resistors, particularly in the form of a resistor chain consisting of four resistors. However, in principle, other numbers of resistors may also be provided.

[0010] Semiconductor switches are particularly constructed as metal-oxide-semiconductor field-effect transistors (MOSFETs). Self-turn-on specifically means that the semiconductor switch is in the on state without external control, i.e., without an applied gate voltage, in which current can flow between the source and drain contacts. Self-turn-off specifically means that the semiconductor switch is in the off state without external control, i.e., without an applied gate voltage, in which no current can flow between the source and drain contacts. In principle, other semiconductor switches can also be used, as long as they can self-turn on or self-turn off without external control.

[0011] Normal operating condition, especially the operating condition of a pulse inverter and / or pulse inverter assembly and / or a device in which the pulse inverter assembly operates in or using the device without faults.

[0012] The pulse inverter assembly may additionally include, in particular, an intermediate circuit capacitor. Furthermore, the pulse inverter assembly may also be provided, in particular, with devices for providing an intermediate voltage to the pulse inverter, for example, in the form of a transformer with an intermediate voltage that can be tapped at the windings.

[0013] Pulse inverter components are particularly useful in transportation vehicles, especially motor vehicles.

[0014] The control device can be configured individually or in combination as a combination of hardware and software, for example as program code implemented on a microcontroller or microprocessor. Alternatively, the portion can be configured individually or in combination as an application-specific integrated circuit (ASIC) or a field-programmable gate array (FPGA). Furthermore, the control device can be configured entirely or partially using analog circuitry techniques.

[0015] In one embodiment, the control device is configured to process multiple input signals in a logically interconnected manner, and if at least one of the input signals meets a preset trigger criterion, the at least one self-conducting semiconductor switch is no longer switched to the off state. Thus, multiple input signals can be used to identify states outside of normal operation. In this case, the logic operation is selected and / or configured to ensure that the at least one self-conducting semiconductor switch always transitions to the on state, even in the event of a logic and / or control device failure.

[0016] In one embodiment, the control device is configured to compare the voltage detected between the positive and negative leads with an overvoltage threshold, and, if the overvoltage threshold is reached or exceeded, to prevent the at least one self-conducting semiconductor switch from being switched off. As a result, overvoltage can be specifically limited and / or reduced on at least one resistor of the at least one resistive assembly, particularly on the RC element formed together with the intermediate circuit capacitor. This protects the pulse inverter assembly from damage.

[0017] It can be improved that the control device is configured to construct and / or provide a hysteresis circuit, wherein the hysteresis circuit ensures that, after reaching or exceeding an overvoltage threshold, the at least one semiconductor switch is switched back to off after falling below a preset reset voltage threshold.

[0018] In one embodiment, a control device is configured to control the at least one self-conducting semiconductor switch in a preset manner based on time, at least outside of normal operation. As a result, the load on the at least one resistor can be limited over time. This allows the at least one or more resistors to be designed to be smaller overall. This reduces cost and installation space (e.g., required board area). In particular, the at least one self-conducting semiconductor switch can be controlled in a pulsed manner to switch back and forth between an on and off state.

[0019] In one embodiment, the pulse inverter assembly includes at least one additional resistive component connected in parallel between the positive and negative leads, and / or at least partially in parallel with at least one resistive component having at least one resistor. The at least one additional resistive component has at least one self-closing semiconductor switch configured and arranged to close or open the electrical connection constructed between the positive and negative leads through the at least one additional resistive component and / or at least partially through the at least one resistive component. A control device is also configured to control the at least one self-closing semiconductor switch, at least outside of normal operation. This improves the discharge of intermediate circuit capacitors and, if necessary, other capacitors, as it provides additional paths for discharge. This enables faster discharge of intermediate circuit capacitors and any other capacitors that may be present. In particular, the number of resistors used for discharge can be increased, allowing for smaller individual resistor designs, thereby saving cost and installation space.

[0020] In one embodiment, the control device is further configured to control the at least one self-conducting semiconductor switch and the at least one self-cutting semiconductor switch such that they switch on in a time-preset manner. In particular, this allows for the distribution of load or power loss. As a result, the resistors can be designed to be smaller, thereby saving cost and installation space. Specifically, the at least one self-conducting semiconductor switch and the at least one self-cutting semiconductor switch can be configured to alternately switch to a conducting state. This can be particularly done in pulse form. For example, the power flow can be distributed in a 50% to 50% ratio over time. However, other ratios can also be set, which can depend particularly on the number and design of the individual resistors in the at least one resistive assembly and the at least one additional resistive assembly. However, it is permissible that the total on time of the at least one self-conducting semiconductor switch and the at least one self-cutting semiconductor switch does not exceed 100%, meaning that the semiconductor switches switch on and off alternately. However, in principle, a total of >100% is also possible.

[0021] In one embodiment, the control device is configured to use and / or evaluate at least one of the following input signals as input signals for controlling the at least one self-turning semiconductor switch and / or the at least one additional self-turning semiconductor switch: a control signal from the pulse inverter controller, a control signal from the pulse inverter co-controller, a fail-safe output from the pulse inverter's system base chip with watchdog (sometimes also called a monitor) function, an overvoltage identification signal from the vehicle controller, and / or an accident signal (collision signal). However, in principle, other input signals may be used alternatively or supplementarily.

[0022] In an improved embodiment, at least two input signals are used to control the at least one self-conducting semiconductor switch and / or the at least one additional semiconductor switch. This creates redundancy. Thus, for example, it is feasible to omit the coprocessor, thereby saving cost and installation space.

[0023] In one embodiment, the pulse inverter assembly includes a switchable voltage measuring device disposed at the at least one resistive assembly. This allows for the detection of a voltage drop at the at least one resistive assembly and, for example, evaluation and use for diagnostic purposes. Switching on and off can be performed, for example, by a semiconductor switch. By using at least a portion of the at least one resistive assembly for voltage measurement, components can be saved, thereby reducing cost and installation space.

[0024] In an improved embodiment, a control device is configured to check the function of the at least one resistive component by controlling the at least one self-conducting semiconductor switch and controlling and / or reading out a voltage measuring device. This allows for checking the plausibility of the circuit. Specifically, different switching states of the at least one self-conducting semiconductor switch and the on / off state of the voltage measurement are activated sequentially. After each activation, it is checked whether the voltage can be detected by the voltage measuring device. Under correct operating conditions, the following plausibility matrix is ​​obtained, where each column of the matrix is ​​considered during the plausibility check: 0110 0011 0010

[0028] Here, the first row in each column indicates the respective switching states of the at least one self-conducting semiconductor switch ("1" = ON). The second row indicates the respective switching states of the voltage measuring device ("1" = ON) in each column, and the third row indicates whether voltage is detected by the voltage measuring device under the correct operating conditions. The voltage measuring device is allowed to detect voltage only under the correct operating conditions, i.e., only when the at least one semiconductor switch is ON ("1") and the voltage measuring device is ON ("1") (entry in the third row = "1"). The third column corresponds to this state. However, in the other three combinations of the switching states of the at least one self-conducting semiconductor switch and the ON and OFF states of the voltage measuring device, no voltage detection is allowed (columns 1, 2, and 4, where the value in the third row is "0"). The control device is therefore specifically configured to check the existence of the corresponding state in the third row of the rationality matrix, in that the switch states are set column by column according to the corresponding states in the first and second rows, and the voltage measurement results are checked with the help of the relevant entries in the third row (i.e., column 1, then column 2, then column 3, then column 4). The order in which the columns are checked can also be different here.

[0029] In one embodiment, the pulse inverter assembly is configured such that it has at least one power supply tap at the at least one resistive assembly, wherein the at least one power supply tap is provided for supplying power to or activating the gate driver of the pulse inverter at least during the on-phase of the pulse inverter. Therefore, the gate driver can be powered during the on-phase without requiring additional components. By using at least a portion of the at least one resistive assembly to power the gate driver during the on-phase, components and installation space can be saved.

[0030] Furthermore, a vehicle has been created that includes at least one pulse inverter assembly according to one of the described embodiments. The vehicle is particularly a motor vehicle, especially a hybrid or electric vehicle. However, in principle, the vehicle can also be other land, water, rail, air, or space vehicles, such as drones or taxi aircraft.

[0031] Other features of the design for this method are derived from the description of the design of the pulse inverter assembly. The advantages of this method are the same as those in the design of the pulse inverter assembly. Attached Figure Description

[0032] The invention will now be explained in more detail with reference to the accompanying drawings and preferred embodiments. Herein:

[0033] Figure 1 A schematic diagram illustrating an embodiment of a pulse inverter assembly;

[0034] Figure 2 A schematic diagram of the logic operation used to control a self-conducting semiconductor switch is shown.

[0035] Figure 3 A schematic diagram illustrating another embodiment of the pulse inverter assembly is shown;

[0036] Figure 4 A schematic diagram illustrating the logic operation of a self-cutoff semiconductor switch for controlling a pulse inverter assembly is shown.

[0037] Figure 5 A schematic diagram illustrating another embodiment of the pulse inverter assembly is shown. Detailed Implementation

[0038] Figure 1 A schematic diagram of an embodiment of the pulse inverter assembly 1 is shown. In particular, the pulse inverter assembly 1 can be arranged and applied in a vehicle 50.

[0039] The pulse inverter assembly 1 includes: a positive high-voltage input terminal 2+, a positive lead 3+ that can be disconnected from the battery B via a protector (not shown); a negative high-voltage input terminal 2-, a negative lead 3- that can also be disconnected from the battery B via a protector (not shown); and a pulse inverter 4 for providing at least one AC voltage from the DC voltage supplied through leads 3+ and 3-. In the illustrated embodiment, the pulse inverter 4 provides a three-phase rotating field for the electric machine M. For this purpose, the pulse inverter 4 is fed with DC voltage supplied by leads 3+ and 3-. For example, an intermediate voltage provided by a transformer (not shown) with a center tap powers the logic and control voltages of the gate driver of the pulse inverter 4.

[0040] The pulse inverter assembly 1 has a resistor assembly 6 between the positive lead 3+ and the negative lead 3-. In the illustrated example, the resistor assembly 6 has four resistors R1, R2, R3, and R4 connected in series. A self-conducting semiconductor switch 7, such as a self-conducting MOSFET, is arranged between the resistors R1, R2, R3, and R4 and the positive lead 3+, or between the resistors R1, R2, R3, and R4 and the negative lead, wherein only one of the two possible configurations is constructed, respectively. The self-conducting semiconductor switch 7 can be used to close or open the electrical connection constructed between the positive lead 3+ and the negative lead 3- via the at least one resistor assembly 6.

[0041] The self-conducting semiconductor switch 7 is controlled by a control device 8 via its gate contacts. The control device 8 is configured to switch the self-conducting semiconductor switch 7 to the off state, at least under normal operating conditions without faults. This disconnects the electrical connection of the series resistors R1, R2, R3, R4 from either the positive lead 3+ or the negative lead 3-, thus preventing any (lossy) power from flowing through resistors R1, R2, R3, R4. In states other than normal operating conditions, such as in a fault state where the electrical connection between battery B and the high-voltage input terminals 2+, 2- has been disconnected, especially by a protector (not shown), the self-conducting semiconductor switch 7 is switched on either by actively cutting off the gate voltage via the control device 8 or passively by removing the gate voltage, thereby establishing an electrical connection between resistors R1, R2, R3, R4 in the resistor assembly 6, and allowing the intermediate circuit capacitor C (and sometimes other capacitors) to discharge in a controlled manner.

[0042] The control device 8 can be configured to control the self-conducting semiconductor switch 6 in a time-dependent manner, at least outside of normal operation. For example, pulse-based control can be performed, wherein the self-conducting semiconductor switch 6 is switched on or off in a pulse manner.

[0043] Figure 2 The diagram shows a self-conducting semiconductor switch 7 ( Figure 1 The diagram illustrates the logic operation 9-1. The control device is configured to process multiple input signals 10-1, 10-2, and 10-3 in a logically interconnected manner, and if at least one of the multiple input signals 10-1, 10-2, and 10-3 satisfies a preset trigger criterion, the self-conducting semiconductor switch 7 will no longer be activated. Figure 1 The self-conducting semiconductor switch 7 is switched to off. Control of the self-conducting semiconductor switch 7 is achieved by a corresponding signal provided at the output terminal 13.

[0044] Specifically, the control device is configured to compare the voltage detected between the positive and negative leads with an overvoltage threshold, and to stop the at least one self-conducting semiconductor switch 7 from turning on when the overvoltage threshold is reached or exceeded. Figure 1 () Switches to cutoff. In the diagram shown, this overvoltage detection unit 11 provides an input signal 10-1.

[0045] The input signal 10-2 can be, for example, generated by a pulse inverter 4 ( Figure 1 The controller 12 provides the input signal. For example, the operating status of the controller 12 can be provided via input signal 10-2. Other input signals 10-3 can be provided by various different devices, such as the accident identification unit 26.

[0046] In the example shown, logic operation 9-1 includes an operational amplifier, two NOR gates and one NAND gate, but in principle it can be constructed differently depending on the application.

[0047] Figure 2 The logical operation 9-1 shown is merely an example, and in principle, it can be constructed in other ways.

[0048] Figure 3 A schematic diagram of another embodiment of the pulse inverter assembly 1 is shown. The pulse inverter assembly 1 is essentially the same as... Figure 1 The embodiments shown are constructed identically; the same reference numerals denote the same features and terms.

[0049] In the illustrated embodiment, the pulse inverter assembly 1 is additionally configured to include a further resistor assembly 14 connected in parallel between the positive lead 3+ and the negative lead 3- and / or at least partially in parallel with the at least one resistor assembly 6. In the illustrated embodiment, the further resistor assembly 14 includes three resistors R20, R21, and R22 connected in series. In this example, the further resistor assembly 14 also has a self-stop semiconductor switch 15 (in principle, the self-stop semiconductor switch 15 may also be arranged on the negative lead 3- side), configured and arranged such that the electrical connection constructed between the positive lead 3+ and the negative lead 3- is closed or opened via the further resistor assembly 14 and / or at least partially via the resistor assembly 6. The control device 8 is also configured to control the self-stop semiconductor switch 15, at least outside of normal operating conditions.

[0050] Specifically, in the illustrated example, the additional resistor assembly 14 is electrically connected to tap 16 between resistors R1 and R2 of resistor assembly 6, and is also electrically connected to the negative lead 3-. Tap 16 is electrically connected to self-stop semiconductor switch 15, which is electrically connected to resistors R20, R21, and R22. However, in principle, the additional resistor assembly 14 can also be designed and electrically contacted in other ways.

[0051] In order to control the self-turn-on semiconductor switch 7 (here connected to the negative lead 3- for example) and the self-turn-off semiconductor switch 15, the control device 8 has, for example, modules 8-1 and 8-2, wherein the logic operations for controlling the semiconductor switches 7 and 15 are respectively constructed in signal technology.

[0052] The control device 8 can be configured to control the self-conducting semiconductor switch 7 and the self-cutting semiconductor switch 15 so that they switch on in a time-preset manner. In particular, the control device 8 can alternately switch the semiconductor switches 7 and 15 on in a pulse manner. This can reduce the load on each resistor Rx.

[0053] Figure 4The diagram shows a self-cutoff semiconductor switch 15 ( Figure 3 The logical operation diagram in 9-2 is shown. It is configured to control device 8 ( Figure 3 Module 8-2 is configured to logically interconnect multiple input signals 10-1, 10-2, 10-3, 10-4, 10-5, and control the self-cutting semiconductor switch 15. Figure 3 ).

[0054] It can be configured to control device 8 ( Figure 3 Use and / or evaluate at least one of the following input signals 10-x as input signals 10-x for controlling the at least one self-turning semiconductor switch and / or another self-turning semiconductor switch 15: control signal of the pulse inverter controller 17, control signal of the pulse inverter co-controller 18, fail-safe output 19 of the system base chip with watchdog function, overvoltage identification signal 20 and / or fault signal 21 of the vehicle controller. In the example shown, logic operation 9-2 includes NOR gates, but in principle it can also be constructed differently depending on the specific application.

[0055] In an improved embodiment, at least two input signals 10-x are configured to control the self-conducting semiconductor switch 7 and / or an additional semiconductor switch 15. Figure 3 This can save resources in other areas. For example, this increased redundancy can save resources in the pulse inverter's co-controller 18.

[0056] Figure 5 The diagram shows a schematic of another embodiment of the pulse inverter assembly 1. The pulse inverter assembly 1 is essentially the same as... Figure 1 The embodiment shown in Figure 3 is constructed in the same manner, with the same reference numerals indicating the same features and terms. In this case, the illustrated embodiment can also be constructed without the additional resistor component 14. The arrangement of the self-conducting semiconductor switch 7 and the self-cutting semiconductor switch 15 can also be substantially different; in particular, they can also be arranged on the negative side (see, for example, see...). Figure 1 ).

[0057] In the illustrated embodiment, the pulse inverter assembly 1 has a connectable voltage measuring device 22 arranged at the resistor assembly 6. In this embodiment, the voltage measuring device 22 includes a diode 23 for reverse polarity protection, which is connected to a voltage tap 24 between resistors R3 and R4 and the emitter of a bipolar transistor 25. The bipolar transistor 25 is connected to resistors R10 and R11 on its collector side, which are connected in series with the GND of the low-voltage power supply. The base of the bipolar transistor 25 is controlled by a module 8-3 provided for this purpose in the control device 8. After the bipolar transistor 25 (and the self-conducting semiconductor switch 7) are turned on, the voltage at resistor R11 drops. The voltage at resistor R11 is detected for diagnostic purposes.

[0058] The control device 8 can be improved by setting up a mechanism to check the function of the resistor assembly 6 by controlling the self-conducting semiconductor switch 7 and controlling and / or reading the voltage measurement device 22. For this purpose, a preset confidence matrix of the switch states is checked in particular. To this end, different switch states of the self-conducting semiconductor switch 7 and the switching on and off of the voltage measurement unit 22 via the bipolar transistor 25 are activated sequentially. After each activation, it is checked whether a voltage can be detected by the voltage measurement device 22. Under correct operating conditions, the following confidence matrix is ​​obtained: 0110 0011 0010

[0062] The first row lists the possible switching states of the self-conducting semiconductor switch 7 ("1" = ON). The second row lists the possible switching states of the bipolar transistor 25 ("1" = ON). The third row lists whether a voltage ("1") is expected. The correct operation, i.e., reliability, is now checked by setting the switching states of the self-conducting semiconductor switch 7 and the bipolar transistor 25 column by column and comparing the subsequent voltage measurements (with or without voltage measurement). The voltage at resistor R11 can only drop (see column 3) when both the self-conducting semiconductor switch 7 and the bipolar transistor 25 are switched ON; otherwise, it cannot.

[0063] The pulse inverter assembly 1 can be configured to have a power supply tap 27 at the resistor assembly 6, wherein the power supply tap 27 is configured to supply power to the gate driver of the pulse inverter 4 via the transformer 5 or activate the power supply section at least during the turn-on phase of the pulse inverter 4. In the example shown, the power supply tap 27 is located between resistors R2 and R3 of the resistor assembly 6. However, in principle, the power supply tap 27 can also be arranged in other locations.

[0064] In addition to improved energy efficiency due to reduced power loss, the use of the pulse inverter assembly 1 described in this disclosure can also save components, thereby saving costs and installation space.

[0065] The method for operating the pulse inverter component 1 is implemented, in particular, by means of one of the described embodiments.

[0066] List of reference numerals

[0067] 1. Pulse Inverter Components

[0068] 2+ Positive high voltage input terminal

[0069] 2- Negative high voltage input terminal

[0070] 3+ positive lead

[0071] 3- Negative lead

[0072] 4. Pulse Inverter

[0073] 5 Transformers

[0074] 6 Resistor Components

[0075] 7 Self-conducting semiconductor switches

[0076] 8. Control equipment

[0077] Module 8-1

[0078] Module 8-2

[0079] Module 8-3

[0080] 9-1 Logical Operations

[0081] 9-2 Logical Operations

[0082] 10-x input signal

[0083] 11 Overvoltage signal

[0084] 12 controllers

[0085] 13 Output terminal

[0086] 14. Other resistor components

[0087] 15 Self-stopping semiconductor switches

[0088] 16 taps

[0089] 17 Controller

[0090] 18. Cooperative Controller

[0091] 19 Fail-safe output terminal

[0092] 20 Overvoltage identification signal

[0093] 21 accident signal

[0094] 22 Voltage measuring equipment

[0095] 23 Diode

[0096] 24 voltage taps

[0097] 25 Bipolar Transistors

[0098] 26 Accident Identification Department

[0099] 27 Power Supply Department Tap

[0100] 50 means of transportation

[0101] B battery

[0102] C. Intermediate circuit capacitor

[0103] M Electric machine

[0104] Rx is the resistor.

Claims

1. A pulse inverter assembly (1), comprising: a positive high-voltage input (2+) for supplying a positive lead (3+); a negative high-voltage input (2-) for supplying a negative lead (3-); a pulse inverter (4) for providing at least one alternating voltage from a direct voltage provided via the leads (3+, 3-); at least one resistive assembly (6) having at least one resistance (Rx) between the positive lead (3+) and the negative lead (3-), wherein the at least one resistive assembly (6) has at least one self-conducting semiconductor switch (7) which is set up and arranged such that an electrical connection configured via the at least one resistive assembly (6) between the positive lead (3+) and the negative lead (3-) is closed or opened; and a control device (8), wherein the control device (8) is set up to switch the at least one self-conducting semiconductor switch (7) into a blocking state at least in a normal operating state, characterized by at least one supply section tap (27) at the at least one resistive assembly (6), wherein the at least one supply section tap (27) is set up to supply or activate a supply section for a gate driver of the pulse inverter (4) at least during a switching-on phase of the pulse inverter (4).

2. The pulse inverter assembly (1) according to claim 1, characterized in that The control device (8) is set up to process a plurality of input signals (10-x) in logical interrelation and to no longer switch the at least one self-conducting semiconductor switch (7) into a blocking state if at least one of the plurality of input signals (10-x) meets a pre-set triggering criterion.

3. The pulse inverter assembly (1) according to claim 1 or 2, characterized in that The control device (8) is set up to compare a voltage detected between the positive lead (3+) and the negative lead (3-) with an overvoltage threshold and to no longer switch the at least one self-conducting semiconductor switch (7) into a blocking state when the overvoltage threshold is reached or exceeded.

4. The pulse inverter assembly (1) according to any of the preceding claims, characterized in that The control device (8) is set up to control the at least one self-conducting semiconductor switch (7) in a pre-set manner depending on time at least outside the normal operating state.

5. The pulse inverter assembly (1) according to any of the preceding claims, characterized in that at least one further resistive assembly (14) between the positive lead (3+) and the negative lead (3-) and / or at least partially in parallel with the at least one resistive assembly (6) having at least one resistance (Rx), wherein the at least one further resistive assembly (14) has at least one self-blocking semiconductor switch (15) which is set up and arranged to close or open an electrical connection configured via the at least one further resistive assembly (14) and / or at least partially via the at least one resistive assembly (6) between the positive lead (3+) and the negative lead (3-), wherein the control device (8) is further set up to control the at least one self-blocking semiconductor switch (15) at least outside the normal operating state.

6. The pulse inverter assembly (1) according to any of the preceding claims, characterized in that The control device (8) uses and / or evaluates at least one of the following input signals (10-x) for controlling the at least one self-conducting semiconductor switch (7) and / or the at least one further self-blocking semiconductor switch (15): a control signal of a controller (17) of the pulse inverter (4), a control signal of a co-controller (18) of the pulse inverter (4), a failsafe output (19) of a system base chip with watchdog function of the pulse inverter (4), an overvoltage recognition signal (20) and / or an accident signal (21) of a vehicle controller.

7. The pulse inverter assembly (1) according to any of the preceding claims, characterized in that An switchable voltage measuring device (22) is arranged at the at least one resistance assembly (6).

8. The pulse inverter assembly (1) according to claim 7, characterized in that The control device (8) is set up to check the function of the at least one resistance assembly (6) by controlling the at least one self-conducting semiconductor switch (7) and controlling and / or reading out the voltage measuring device (22).

9. A method for operating a pulse inverter assembly (1), wherein at least one resistance assembly (6) with at least one resistance (Rx) is operated between a positive lead (3+) fed by a positive high-voltage input (2+) and a negative lead (3-) fed by a negative high-voltage input (2-), wherein at least one self-conducting semiconductor switch (7) of the at least one resistance assembly (6) is operated for closing or opening an electrical connection configured via the at least one resistance assembly (6) between the positive lead (3+) and the negative lead (3-), and wherein the at least one self-conducting semiconductor switch (7) is switched into blocking at least in a normal operating state by means of a control device (8) of the pulse inverter assembly (1), characterized in that at least one power supply section tap (27) at the at least one resistance assembly (6) supplies or activates a gate driver of the pulse inverter (4) at least during a switching-on phase of the pulse inverter (4).

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