CN206394446U - Safety device, electrical component and electricity or motor vehicle driven by mixed power - Google Patents

Abstract

The utility model relates to a safety device, an electric component and an electric or hybrid vehicle. Safety device for protection against dangerous touch voltages at electrical components in electrical components of electric or hybrid vehicles, having: a service cover at the component housing of the electrical component, which is closed for normal operation of the electrical component The service opening to the housing interior; the safety molding of the service cover, which has a cutout at the safety molding; and the cover of the cutout constructed of the safety molding; wherein, for normal operation, the The mechanically connected signal plug connections of the component housings can be guided through the cutouts and can be at least partially surrounded by a cover which, for normal operation, can be arranged over the signal sockets of the signal plug connections and the signal sockets connected to the signal sockets. Between the plugs, and for service, the signal plug can be separated from the signal receptacle and the cover can be removed from the signal plug connection and the service cover can be removed from the assembly housing.

Description

Safety devices, electrical components and electric or hybrid vehicles

technical field

The utility model relates to a safety device for preventing dangerous contact voltages at electric components in an electric assembly of an electric or hybrid vehicle, which has a service cover at the assembly housing of the electric assembly, which is an electric assembly The service opening of the module housing is closed for normal operation. Furthermore, the utility model relates to an electric assembly with the safety device and an electric or hybrid vehicle with the electric assembly.

Background technique

For electrical components that are used not only in an industrial environment but also in the automotive sector, it is often necessary, in particular for maintenance or service activities, to provide access to the interior of the component housing by means of a corresponding service opening or by means of a housing cover The entry of electrical components in. Labels in the visible range of the electrical component generally warn that before opening the component housing, a voltage-free situation is established for electrical components carrying voltage at least during normal operation of the electrical component. Particular attention is paid to electrical components that are not electrically insulated or are otherwise protected from direct access by persons.

In this context, normal operation is understood to be the operating state of an electrical component in which no activation by an operator or an application process results in a shutdown of the energy distribution or energy supply to the electrical component and its electrical components. During normal operation, access via the service opening to the housing interior of the electrical component is also not possible, or only with the use of special safety devices.

Since electric or hybrid vehicles are increasingly using high-voltage accumulators for the energy supply of the electric drive system, which have a voltage level of up to 800 V direct current or higher, all of the leading voltages in normal operation, Potentially dangerous touch voltages are present in electrical components operating on high voltage networks used to distribute electrical energy.

Correspondingly, the automotive industry must ensure that in the event of accidents and for service operations on electrical components of electric or hybrid vehicles, it is required that no dangerous touch voltages be present in the shortest possible time. For this purpose, an active discharge of electrical energy is often carried out for electrical components which are electrically connected, for example, to a high-voltage network. This also applies to intermediate circuit capacitors on the direct voltage intermediate circuit of the converter, which generally still store electrical energy after the electrical components have been separated from the energy supply. The wire itself is capable of storing electrical energy to an extent limited by its size. For example, an ohmic resistor is used to discharge the electrical energy of the intermediate circuit capacitor, which is arranged together with the intermediate circuit capacitor on the DC voltage intermediate circuit. Another solution is an electric motor run by an inverter, that is, the motor discharges electrical energy in its windings. Correspondingly, the electrical energy of the intermediate circuit capacitors is converted into heat energy.

However, the DC voltage of the intermediate circuit capacitor can only decay for a set time depending on the electrical components of the converter without active discharge. It is often not possible in this period of time after separation of the energy supply from the electrical component to ensure that the electrical components are voltage-free when the direct access to the housing interior of the electrical component is made.

Known solutions for ensuring the absence of voltage at electrical components in the interior of the component housing therefore use, for example, interlocking plug systems which monitor the electrical and mechanical connections of the electrical lead-in and lead-out at the electrical component. Before removing the housing cover, it is often necessary to separate all monitoring plugs from the component housing in order to achieve safe access to the interior of the component housing. The removal of the electrical connection is monitored, wherein removal of such a plug usually triggers an active discharge of the electrical components. The discharge of electrical energy to a non-hazardous voltage value within a defined time.

However, it is irrelevant to the operator whether he actually removes the electrical input and output plugs before entering the housing interior via the service opening or the housing cover and whether the interlocking plug system is then actuatable. Without action, access to the housing interior is also possible without preventing dangerous voltages at the electrical components.

Strict requirements apply in particular to personnel against dangerous contact voltages. Therefore, according to DINVDE0100-410, the non-hazardous stable contact voltage is a direct voltage of ≤ 120V DC for adults and a direct voltage of ≤ 60V for children and domestic animals. In the automotive industry a DC voltage of ≦60 V is usually determined as the limit for hazardous touch voltages.

In particular, safety-technical considerations in the automotive sector consider it important that, for access to the housing interior of electrical components, control and regulation functions are also interrupted, which are not directly linked to safety-technical functions and must also be serviced on electrical components And keep it up. For example, during service or in the event of an accident, an uncontrolled or uncontrolled actuation of the power semiconductor modules in a converter for actuating an electric machine must be avoided. Therefore, before accessing the housing interior via the service opening, deactivating the signal connections for the control and control functions by removing the signal plug is an important part of the service routine with regard to protection against dangerous contact voltages.

Products and applications in the automotive industry, for example, require more and more multiple insurances against dangerous touch voltages, which should ensure that, for example, in the event of failure or tampering with the primary safety system or when bypassing safety regulations, at least An additional security system is mandatory.

Utility model content

The purpose of the utility model is to propose a safety device, by means of which it is possible to achieve safe, low-cost and low-cost access to the inner space of the housing of the electrical component on the electrical component, wherein at the time of entry , the hazardous touch voltage at the electrical components of the electrical assembly has reliably decayed to a non-hazardous value.

This object is achieved by the safety device of the present utility model.

This object is also achieved by the electric assembly of the invention and by the electric or hybrid vehicle of the invention.

The invention recognizes that for electrical components entering into an electrical component, for example for service situations, it must be ensured that a particular person cannot be injured by touching the electrical components due to dangerous contact voltages. This means that access to the housing interior of the electrical component can only be permitted when the potentially dangerous touch voltage that may still be present at the electrical component has dropped or decayed to an indisputable value by means of an active discharge.

Accordingly, the opening of the housing cover or of the special service opening must be required by the operator for such a length of time that, for free access to the electrical components, dangerous contact voltages are no longer applied to the electrical components in the housing interior. component. This requirement is used to find corresponding safety systems which, on the one hand, provide additional protection for existing safety systems and, on the other hand, can be installed and installed efficiently not only because of their complexity but also from a cost point of view.

Therefore, in order to achieve this object, a safety device for preventing dangerous touch voltages at electrical components in an electrical component of an electric or hybrid vehicle is proposed, which has a service cover on the component housing of the electrical component, It closes the service opening to the housing interior for the normal operation of the electrical components, and also has a safety profile with a cutout for the service cover at the safety profile, and also has a retaining profile formed from the safety profile. Covering of the cutout, wherein, for normal operation, a signal plug connection mechanically connected to the component housing can be guided through the cutout and at least partially surrounded by the cover, wherein, also for normal operation, The cover can be arranged between the signal receptacle to which the signal plug is connected and the signal plug connected to the signal receptacle, and wherein, for servicing, the signal plug can be separated from the signal receptacle, and the cover can be removed from the signal plug connection and the service The cover is removable from the component housing.

Signal sockets are usually equipped with flexible lines, so that the separation of the signal plug from the signal socket provides sufficient free space and also enables the cover formed on the safety profile to be removed from the signal plug connection.

The component housing of the electrical component can be assembled from various housing elements, which are generally detachably connected to one another. Thus, structures with a component housing and a component housing cover as well as a component housing bottom are known. However, each of these housing elements can in turn be composed of a plurality of assembly housing parts.

In principle, every opening in the component housing can be provided as a service opening, which enables access to the housing interior and the electrical components. Therefore, at least the component housing cover can also be regarded as a form of service cover.

As mentioned at the outset, the services at the electrical components of electrical components for various applications in the industrial environment as well as for products of the automotive industry are not only important for reliable operation, also referred to here as normal operation. necessary. Preventive servicing also has a cost-saving aspect, such as servicing of individual electrical components in advance to avoid greater damage when installing electrical components into complex applications, such as electric or hybrid vehicles. Of course, repairs and special maintenance work on electrical components in the housing interior can also be understood as service.

The current solution offers the possibility of expanding established safety systems, such as interlocking plug systems which can also be used in particular for signal plug connections, so that it is possible to use less additional material and with the aid of smaller processes The complexity increases the protection of the electrical components against dangerous touch voltages. In the exemplary installation of the known interlocking socket system, after separation of the signal socket and the signal plug mechanically connected to the component housing, it is assumed that this separation triggers at least a deactivation of the power supply and the supply of energy to the electrical component. coupling, where possible an active discharge of the electrical components in the housing interior is also initiated. However, if the separation of the signal socket and the signal plug of the signal plug connection is not carried out, multiple accesses to the housing interior can be achieved tamperingly or system-inherently despite the interlocking plug system, so that the existing security procedures can be bypassed.

Because with the present solution the signal plug connection is guided through the cutout of the safety profile part during normal operation and is surrounded by a cover formed on the safety profile part and the cover is arranged between the signal socket and the signal plug connection of the signal plug connection. Between the signal plugs to which the sockets are connected, the signal plugs must therefore be separated from the signal sockets to which the signal plugs are connected for service, ie access to the housing interior via the service opening. Only such a process is possible that not only the cover is removed from the signal plug connection, but also the service cover is also removed from the component housing together, wherein access to the housing interior of the electrical component is permitted.

The signal line, as it is led via the signal plug connection into the housing interior of the electrical component, transmits a plurality of pieces of information for the control and regulation functions of the electrical component. If services on electrical components are planned especially in connection with access to the housing interior, then not only all lead-in and lead-out lines for the power part of the electrical component should be disconnected electrically, but also the All at least non-safety-related signal lines of control and regulating units for electrical components. An undesired and possibly uncontrollable actuation of the electrical components, which can take place during service, is thus prevented.

In a first advantageous embodiment of the safety device, the monitoring signal of the monitoring circuit can be conducted via the signal plug connection by means of the signal socket and the signal plug, the monitoring signal being designed to be used when the signal socket and the signal plug are connected Change the state of the monitoring signal or the value of the monitoring signal when it is separated or connected at the electrical connection position.

With this embodiment it is also possible to integrate known interlocking plug systems into the proposed safety device. The monitoring signal provides the information in the monitoring of the connection between the signal plug and the signal socket whether the service opening for access to the electrical component is open or closed.

In another advantageous embodiment of the safety device, the safety device has an evaluation unit by means of which the monitoring signal can be evaluated and the monitoring results can be provided.

Therefore, after evaluating the monitoring signal, a statement in the form of the monitoring result that can be deduced in principle is, on the one hand, whether a service can be performed in the housing interior, for which touch voltages for preventing hazards must be initiated and carried out. additional measures. On the other hand, the description can indicate whether the electrical component is in normal operation or is at least ready for use in normal operation.

In a next advantageous embodiment of the safety device, the service cover is connected to the component housing via at least one service cover fastener.

The cover with the service cover of the safety profile and the recess formed on the safety profile can be arranged in such a way that fastenings for the service cover can also be dispensed with, since for normal operation the connection by the signal plug, in particular The cover is held mechanically by its arrangement between the signal plug and the signal socket. When using electrical components, however, a stable, inherently safe mechanical connection of the service cover to the component housing is advantageous for applications with high mechanical loads (eg vibrations).

In a further advantageous embodiment of the safety device, a seal is arranged between the service cover and the component housing.

Since electrical components are of great importance not only in the industrial environment but also in the automotive sector due to the often harmful environmental conditions of the dust-tight or water-resistant enclosure, the service openings represent a weakness with respect to the negative influence of the environmental conditions. For the selection of the seal it must be taken into account that this seal is subject to severe wear due to repeated opening and closing of the service cover at the service opening.

In an equally advantageous embodiment of the safety device, the cover of the cutout, which is formed from the safety profile, covers at least one signal socket fastening element, which connects the signal socket of the signal plug connection to the component housing.

The security device thus fulfills an additional security function and prevents the possibility, by tampering with the security function process or the security process, of access to the housing interior via the signal plug connection during normal operation. Removal of the signal socket or the signal plug connection from the component housing is only possible for service when the cover formed by the safety profile is removed from the signal plug connection and allows access to at least one signal socket fastener. Achieved.

To achieve this object, an electrical component with a safety device according to the invention is also proposed, wherein the electrical component has a discharge device for the service, by means of which the function of preventing Hazardous touch voltage, active discharge of electrical components.

After evaluation of the monitoring signal which gives the information that a service at the electrical component is imminent, possibly with the removal of the signal plug connected to the signal plug from the signal socket, the result of the monitoring of the discharge device indicates that, by means of The active discharge of electrical components is performed by the discharge device.

The discharge device is designed for active discharge in such a way that, before the signal plug to which the signal plug is connected is removed from the signal socket, dangerous contact voltages which may still be present at the electrical components are at least at the latest when the service cover is Dissipated when the internal space of the device is open and has access to electrical components. The electrical components required for the discharge device, such as discharge resistors, electrical switches and control devices, can be dimensioned as a function of the electrical value of the electrical component to be discharged, for example the capacity value of a capacitor.

In a first configuration of the electrical component, the electrical component is a converter which is provided for driving an electric motor or for converting electrical energy.

Such converters, for example, have a direct-voltage intermediate circuit, where they are usually operated with one or more intermediate-circuit capacitors. In the case of high voltage levels on the DC intermediate circuit of the converter, which is generated, for example, by a high-voltage DC voltage source, it must be ensured, in particular for servicing the electrical components, that after switching off the high-voltage DC voltage source, personnel will not be able to Exposure to hazardous touch voltages due to contact with electrical components of electrical components. Since access to the housing interior of the electrical component is often associated with servicing the electrical component, the use of safety elements is particularly advantageously suited for the protection against dangerous contact voltages.

To discharge the electrical energy, the discharge device often uses an ohmic resistor, which is arranged in the converter together with the DC link capacitor on the DC voltage link. An intermediate circuit capacitor is, for example, also referred to here as an electrical component to be discharged, in addition to what is often referred to as a non-insulated circuit and connection.

A further solution is that in which the electric machine operated by the converter discharges the electrical energy to be discharged of the electrical components in its winding. Electric energy is correspondingly converted into heat energy.

Furthermore, an electric or hybrid vehicle with an electric component according to the invention is proposed for achieving this object.

Electric or hybrid vehicles are subject to a wide variety of demands and conditions for protecting people and physical assets. If, for example, electrical components in an electric or hybrid vehicle are subjected to service, then when access is required to the housing interior space of the electrical components of the electric or hybrid vehicle, it is ensured in particular by means of the safety device according to the invention to prevent Hazardous touch voltage. When the electrical component is in normal operation, the safety device also provides protection against unintentional or tampering opening and protection against unintentional entry into the housing interior at an angle against dangerous touch voltages.

Description of drawings

In conjunction with the description of the embodiments described in detail below in conjunction with the accompanying drawings, the above-mentioned characteristics, features and advantages of the present utility model as well as the manner and method of realization are more clearly and comprehensibly set forth. Shown here:

1 is a first cross-sectional schematic view of a safety device according to the invention for preventing dangerous touch voltages at electrical components in a housing interior of an electrical assembly,

Figure 2 is a first three-dimensional view of the safety device for normal operation of the electrical assembly according to Figure 1 ,

Figure 3 is a second three-dimensional view of the safety device for the service of electrical components according to Figures 1 and 2,

FIG. 4 is a schematic diagram of an electric or hybrid vehicle with a converter as an electrical component according to the invention for operating an electric machine.

detailed description

FIG. 1 shows a schematic cross-sectional view of a safety device 1 for preventing dangerous touch voltages at electrical components 2 in a housing interior 8 of an electrical component 3 .

The service cover 5 on the component housing 6 of the electrical component 3 closes the service opening 7 to the housing interior 8 during normal operation NB of the electrical component 3 . The service cover 5 has a safety profile 9 with a first right-angled bead, which forms the cover 11 of the cutout 10 by means of a further right-angled bead. The service cover 5 forms a stepped contour with the safety profile 9 and the cover 11 of the cutout from the perspective of the cross-sectional view in FIG. 1 . In order to seal off the housing interior 8 at the service opening 7 , a seal 20 is fitted between the service cover 5 and the component housing 6 .

For normal operation NB, the service cover 5 is fastened at the assembly housing 6 by service cover fasteners 19 . Mechanically connected to the component housing 6 is a signal plug connection 12 , which is guided through a cutout 10 and surrounded by a cover 11 formed on the safety profile 9 . The cover 11 is arranged between the signal socket 13 of the signal plug connection 12 and the signal plug 14 connected to the signal socket 13 . Removal of the cover 11 from the signal plug connection 12 is not possible when the signal plug 14 is connected to the signal socket 13 , as it normally is during normal operation of the electrical component 3 . A signal cable is installed at the signal plug 14 .

The signal socket 13 of the signal plug connection 12 is mechanically connected to the component housing 6 by a signal socket fastener. However, the cross-sectional view of FIG. 1 is not suitable here for visualizing the signal socket fastener (FIG. 2 and FIG. 3 show a suitable signal socket fastener 21).

The monitoring signal S in the monitoring circuit 15 is conducted via the signal plug connection 12 by means of the signal socket 13 and the signal plug 14 , which is designed for when the signal socket 13 and the signal plug 14 are at the electrical connection point 16 of the signal plug connection 12 Change the status of the monitoring signal or the value of the monitoring signal when disconnecting or connecting.

An evaluation A of the monitoring signal S can be carried out and a monitoring result E can be provided by means of the evaluation unit 17 in the housing interior 8 of the electrical component 3 . An active discharge AE of the electrical component 2 for the service SC can then be carried out by means of the discharge device 18 for protection against dangerous touch voltages in the relationship that the monitoring result E depends on the evaluation A of the evaluation unit 17 .

The signal plug 14 can thus be separated from the signal socket 13 for the service SC, wherein the signal plug 14 releases the latching of the cover 11 . With the removal of the signal plug 14 the monitoring signal S changes its state and its value, the evaluation A of the evaluation unit 17 recognizes this change and informs the discharge device 18 so that due to the removal of the signal plug 14 at the electrical The active discharge AE implemented by the discharge device 18 is performed.

After the service cover fastener 19 has been released, the cover 11 formed on the safety profile 9 can now be removed from the signal plug connection 12 and the service cover 5 can be removed from the component housing 6 . From the point in time when the signal plug 14 is removed until free access to the housing interior 8 via the service opening 7, the active discharge AE reduces the dangerous contact voltage at the electrical components 2 to a level that is not dangerous for persons, these In the service SC of the electrical component 3 , a person should not touch the electrical component 2 after entering the housing interior 8 .

FIG. 2 shows a first three-dimensional illustration of the safety device 1 according to FIG. 1 , which shows features of the safety device 1 for normal operation NB of the electrical component 3 .

The service cover 5 connected to the component housing 6 of the electrical component 3 by means of the service cover fastener 19 has a safety profile 9 with a first right-angle bead, which forms the cutout by means of a further right-angle bead ( The cutout is not directly shown in FIG. 2 ) of the cover 11 .

The signal socket 13 of the signal plug connection 12 is mechanically connected to the component housing 6 by means of two signal socket fasteners 21 . The signal plug connection 12 is guided through a cutout (the cutout is not directly shown in FIG. 2 ) and is surrounded by a cover 11 formed on the safety profile 9 . The cover 11 is in turn arranged between the signal socket 13 of the signal plug connection 12 and the signal plug 14 connected to the signal socket 13 . Removal of the cover 11 from the signal plug connection 12 is not possible when the signal plug 14 is connected to the signal socket 13 , as it normally is during normal operation of the electrical component 3 . The signal cables installed at the signal plug 14 are not shown in FIG. 2 .

The cover 11 covers at least for the normal operation of the signal socket fastening 21 in such a way that it is not possible to detach the signal socket 13 of the signal plug connection 12 from the component housing 6 .

Access to the housing interior of the electrical component 3 at the service opening is thus closed by means of the service cover 5 . Protection against dangerous touch voltages in the housing interior is therefore excluded via the service opening without repeated actuation at the electrical component 3 during normal operation of the NB.

FIG. 3 shows the features of the security device 1 for the service SC of the electrical component 3 by means of a second three-dimensional representation of the security device 1 according to FIGS. 1 and 2 .

If the signal plug 14 is separated from the signal socket 13 , the cover 11 closing off the cutout 10 , formed on the safety profile 9 and arranged on the signal plug connection 12 , becomes ineffective. With the removal of the service cover fastener 19 , the cover 11 can be removed from the signal plug connection 12 and the service cover 5 together can be removed from the component housing 6 .

Access to the housing interior of the electrical component 3 via the service opening is free for the service SC, dangerous contact voltages that might still be present at the electrical components in the housing interior having decayed before the service cover 5 was opened.

Only after removal of the cover 11 is it possible to unhook the signal socket fastening 21 and remove the signal socket 13 from the component housing 6 if necessary also for the service SC.

FIG. 4 shows a schematic illustration of an electric or hybrid vehicle 4 with a converter 22 as an electrical component 3 according to the invention for operating an electric machine 23 .

For the converter 22 in the electric or hybrid vehicle 4 , there are usually provided compartments for servicing the electric components 3 . It can be determined by means of evaluation A in evaluation unit 17 whether a service is pending or whether converter 22 is ready for normal operation. In the case of servicing, access to the electrical components 2 of the electrical components 3 or of the converter 22 is required. The monitoring result E from the evaluation unit 17 signals to the discharge device 18 that the electrical component 2 must be discharged before entering. The discharge device 18 performs an active discharge AE of electrical energy at the electrical component 2 and thus protects persons from dangerous contact voltages in the event of possible contact with the electrical component 2 .

Claims (11)

1. a kind of safety device (1), the safety device is used to prevent in the electrical component (3) of electricity or motor vehicle driven by mixed power (4) Electric components (2) place dangerous contact voltage, it is characterised in that the safety device has：

Service lid (5) at assembly housing (6) place of the electrical component (3), the service lid is the normal of the electrical component (3) The service opening (7) run (NB) and closed to enclosure interior space (8),

The safe styling members (9) of the service lid (5), has portion (10) of leaving a blank at safe styling members (9) place, and

By safe styling members (9) construction, the portion of leaving a blank (10) covering (11), wherein,

For the normal operation (NB), the Signal plug mechanically connected with the assembly housing (6) is connected (12) energy By the portion of leaving a blank (10) guiding and can by the covering (11) at least partially around,

For the normal operation (NB), the covering (11) can be arranged in the signal of the Signal plug connection (12) Between socket (13) and the Signal plug (14) being connected with the signal plug (13), and

For service (SC), the Signal plug (14) can separate with the signal plug (13), and the covering (11) it can be removed from Signal plug connection (12) and the service lid (5) can remove from the assembly housing (6).

2. safety device (1) according to claim 1, it is characterised in that by means of the signal plug (13) and described Signal plug (14), can guide the monitoring signal (S) of monitoring circuit (15), the prison via Signal plug connection (12) It is used for depending on Design of Signal, when the signal plug (13) and the Signal plug (14) connect the electricity of (12) in the Signal plug Link position (16) place changes the state of the monitoring signal or the value of the monitoring signal when being separate or may be linked.

3. safety device (1) according to claim 2, it is characterised in that the safety device (1) has assessment unit (17), the assessment (A) to the monitoring signal (S) can be performed by means of the assessment unit and monitoring result (E) can be provided.

4. safety device (1) according to any one of claim 1 to 3, it is characterised in that the service lid (5) via At least one service cover fastener (19) is connected with the assembly housing (6).

5. safety device (1) according to any one of claim 1 to 3, it is characterised in that in the service lid (5) and Seal (20) is disposed between the assembly housing (6).

6. safety device (1) according to claim 4, it is characterised in that in the service lid (5) and the assembly housing (6) seal (20) is disposed between.

7. safety device (1) according to any one of claim 1 to 3, it is characterised in that by the safe styling members (9) construction, the portion of leaving a blank (10) covering (11) covers at least one signal plug fastener (21), the letter The signal plug (13) that the Signal plug connects (12) is connected by number socket fastening piece with the assembly housing (6).

8. safety device (1) according to claim 6, it is characterised in that by safe styling members (9) construction, institute The covering (11) for stating the portion of leaving a blank (10) covers at least one signal plug fastener (21), the signal plug fastener The signal plug (13) that the Signal plug is connected into (12) is connected with the assembly housing (6).

9. a kind of electrical component (3), the electrical component has safety device according to any one of claim 1 to 8 (1), Characterized in that, the electrical component (3) has electric discharge device (18) for service (SC), by means of the electric discharge device energy Depending on the assessment (A) of assessment unit (17) monitoring result (E) perform for prevent danger contact voltage, electric components (2) active discharge (AE).

10. electrical component (3) according to claim 9, it is characterised in that the electrical component (3) is current transformer (22), described Current transformer is provided for motor (23) or for converting electric energy.

11. a kind of electricity or motor vehicle driven by mixed power (4), it is characterised in that the electricity or motor vehicle driven by mixed power have will according to right Seek the electrical component (3) described in 9 or 10.