Motor with a frequency inverter and a switch for switching a single-phase alternating current

Abstract

Switch for switching a single-phase alternating voltage, wherein the switch comprises an input interface having two input channels, wherein the switch comprises an output interface having three output channels, and wherein the switch has a switching element with a switching contact such that, by switching the switching element, the switching contact closes an electrically conductive contact between a first input channel and a first output channel or between the first input channel and a second output channel.

Description

State of the art

[0001] Common frequency converters comprise an input side to which a single-phase AC voltage can be connected, an output side from which a three-phase AC voltage can be drawn, and a control interface. The control interface allows, for example, the switching or control of the frequency converter's output side.

[0002] From DE 299 01 271 U1 an electric drive unit is known which has a power supply unit and a three-phase drive motor, wherein the power supply unit has a frequency converter. Purpose and advantages of the invention

[0003] The object of the present invention is to provide an optimized motor with a frequency converter, wherein in particular the frequency converter is comparatively easy to control and / or regulate.

[0004] This problem is solved by the features of independent claim 1.

[0005] The dependent claims describe advantageous and appropriate embodiments of the invention.

[0006] The invention is based on a switch for switching a single-phase alternating voltage.

[0007] Single-phase alternating current is, for example, a conventional single-phase alternating current, such as a standard 230V or 240V AC household current with phases L (live conductor) and N (neutral conductor). Household current also includes, for example, a protective earth conductor (PE).

[0008] The switch comprises an input interface having exactly two input channels, an output interface having exactly three output channels, and a switching element with a switching contact such that, when the switching element is activated, the switching contact closes an electrically conductive contact or connection between a first input channel and a first output channel, or between the first input channel and a second output channel. The switching contact is configured, for example, to establish or break an electrically conductive connection between an input channel and an output channel, e.g., to open or close the electrically conductive connection.

[0009] A second input channel and a third output channel of the switch are electrically connected. The second input channel and the third output channel are permanently, and in particular rigidly, connected. The second input channel and the third output channel are, for example, formed as a single unit. The neutral conductor (N) of the single-phase AC voltage can be connected to the second input channel. Advantageously, the second input channel and the third output channel are configured as a neutral conductor. For example, the switch is designed to operate with a frequency converter. The frequency converter is configured to generate a three-phase AC voltage from a single-phase AC voltage. The three-phase AC voltage is, for example, present as conventional three-phase current with phases L1, L2, L3, and N.

[0010] The switch is available, for example, as a frequency converter switch and / or as a geared motor switch. If the switch is available as a frequency converter switch and / or as a geared motor switch, it is designed to switch the drive direction of a motor by switching an input voltage of the frequency converter, in particular of the motor.

[0011] It is also conceivable that the input interface has a third input channel. Advantageously, this third input channel is configured as a protective earth (PE) conductor. It is also conceivable that a fourth output channel is present, which e.g.is designed as a protective conductor (PE). For example, the third input channel and the fourth output channel are electrically connected. The third input channel and the fourth output channel are, in particular, permanently connected to each other, e.g., inseparably. The third input channel and the fourth output channel are, for example, formed as a single piece.

[0012] The switch can be designed, for example, as a push-button switch, a toggle switch, a rocker switch, a rotary switch, and / or a key switch. Other switch types are also conceivable. The switching element of the switch can be designed, for example, as a push button, a toggle switch, a rotary switch, and / or a lock. The switch can be, for example, a component of a control system, a controller, and / or a regulation system. The control system can be, for example, a climate control system and / or a programmable logic controller (PLC).

[0013] Furthermore, it is advantageous that the switch, in particular the switching element with the switching contact, is designed in such a way that an electrically conductive connection or an electrically conductive contact of an input channel with an output channel of the switch can be separated by a switching operation of the switching element, so that the first input channel of the input interface is not electrically conductively connected to the first and / or second output channel of the output interface and / or the second input channel of the input interface is not electrically conductively connected to the third output channel of the output interface.

[0014] Advantageously, the switch is designed in such a way that all electrically conductive connections between the input interface and the output interface can be separated, in particular by a single switching operation, for example, a simultaneous switching operation involving several switching contacts.

[0015] Advantageously, the switching element comprises two or three switching contacts. For example, a first switching contact is configured to open or close an electrically conductive contact between the first input channel and the first output channel, and a second switching contact is configured to open or close an electrically conductive contact between the first input channel and the second output channel, wherein the switch is configured such that either an electrically conductive contact between the first input channel and the first output channel is closed, or an electrically conductive contact between the first input channel and the second output channel is closed. However, it is conceivable that both of the aforementioned electrically conductive contacts are open simultaneously. The switch or...The switching element is preferably designed to actuate the first and second switching contacts simultaneously. It is also conceivable that a third switching contact is present to open or close an electrically conductive contact between the second input channel and the third output channel.

[0016] An advantageous embodiment of the invention is a frequency converter for a motor, in particular for a geared motor, wherein the frequency converter advantageously comprises a switch according to one of the previously described embodiments. The frequency converter is configured to generate a three-phase alternating voltage from a single-phase alternating voltage applied to the input side, wherein the frequency converter has two inputs for one phase of a single-phase alternating voltage and three outputs for three different phases of a three-phase alternating voltage, wherein the frequency converter is configured such that, depending on the assignment of the phase of the single-phase alternating voltage to the two inputs, in particular exactly two different phases of the three-phase alternating voltage are exchanged at the outputs, such that the direction of rotation of a motor connectable to the frequency converter is changed.

[0017] Advantageously, the frequency converter has exactly three or, more specifically, exactly four inputs, wherein, for example, a first and a second input are provided for connecting a phase L of the single-phase AC voltage, and, for example, a third input is provided for a neutral conductor N of the single-phase AC voltage. A fourth input of the frequency converter can be configured for connecting a protective conductor PE or an earth. Preferably, in the connected state, i.e., in the electrically conductive state of the frequency converter connected to the single-phase AC voltage, either the first or the second input is electrically connected or contacted with the phase L. Advantageously, the first and second inputs are not simultaneously connected to the phase L from the outside, e.g., by a switch arranged at the inputs of the frequency converter.An internal, electrically conductive connection between the first and second inputs of the frequency converter through components of the frequency converter is conceivable.

[0018] The switch is located, for example, directly on the frequency converter, particularly on the converter's housing. It is also conceivable that the switch is located at a distance from the frequency converter, for example, on a control cabinet. The frequency converter is, for example, a geared motor frequency converter, specifically a three-phase AC geared motor frequency converter.

[0019] The frequency converter is advantageously designed such that no additional control signal, e.g., in the form of a control voltage, is necessary to exchange phases, e.g., L1, L2, and / or L3, at the outputs of the frequency converter. Preferably, the frequency converter does not have an interface for additional control. In particular, the frequency converter does not have an interface for additional control for switching, regulating, and / or exchanging the phases applied to the outputs of the frequency converter.

[0020] It is conceivable that the frequency converter has an interface for a control system, for example, to switch the frequency converter so that a power supply or a phase (e.g., L1, L2, L3, and / or N) at an output of the frequency converter is interrupted. It is also conceivable that the control system is designed to collect and provide operating data from the frequency converter. Operating data from the frequency converter includes, for example, temperature or power.

[0021] According to the invention, a motor, in particular a geared motor, is proposed, comprising a frequency converter according to one of the aforementioned embodiments, and a switch according to one of the aforementioned embodiments, wherein the motor is designed as a three-phase AC motor and, depending on the configuration of the two inputs of the frequency converter, e.g., the two inputs for phase L, and / or on the switching position of the switching element of the switch, two phases of the three-phase AC voltage are exchanged on a current input side of the motor, thereby determining a direction of rotation of the motor.

[0022] Advantageously, the frequency converter is located directly on the motor. For example, the motor may incorporate the frequency converter. It is also conceivable that the frequency converter is mounted on or attached to the motor housing. For instance, the frequency converter may be integrated within the motor housing, with the motor housing enclosing the frequency converter. The switch may be located on the motor housing, for example, mounted on it. It is also conceivable that the switch is integrated within the motor housing.

[0023] Preferably, the motor includes a gearbox. For example, the gearbox is housed within the motor casing. The motor's gearbox, in particular the geared motor, advantageously interacts with a drive shaft. The gearbox, in particular the geared motor, acts directly on the drive shaft. The drive shaft is, for example, designed as a winding shaft. For example, the drive shaft is part of a rack and pinion drive, a winding drum, a reduction gear, and / or an expansion gear.

[0024] Another advantageous embodiment of the invention is a drive system comprising a motor according to one of the preceding embodiments, a frequency converter according to one of the preceding embodiments and / or a switch according to one of the preceding embodiments.

[0025] The drive system is advantageously configured as a drive system for a ventilation device, a drive system for a winding device, a drive system for a lifting device, a drive system for a gathering device, and / or a drive system for a flap device. For example, the drive system is configured as a ventilation drive system, a winding device drive system, a lifting drive system, a gathering device drive system, and / or a flap drive system.

[0026] The ventilation device is designed, for example, as a roller vent, a roller vent, and / or a flap vent. Advantageously, the ventilation device is designed for ventilating a utility building. A utility building is, for example, a greenhouse, a hothouse, a barn, and / or a warehouse. Advantageously, the ventilation device is designed as a building ventilation device, in particular as a utility building ventilation device. The ventilation device includes, for example, a lifting device and / or a roller vent and / or a flap vent, in particular for moving a closing element of a building opening.

[0027] Furthermore, a ventilation device, a winding device, a lifting device, a gathering device and / or a flap device with a drive system, a motor, a frequency converter and / or a switch is proposed. Description of an exemplary embodiment

[0028] An exemplary embodiment is explained in more detail with reference to the schematic drawings below, which also provide further details and advantages: The drawings show: Figure 1 is a schematic sectional view of a switch, Figure 2 is a schematic representation of a drive system with a switch, a frequency converter and a motor, Figure 3 is an exploded view of a ventilation device, Figure 4 is a perspective view of a flap or lifting device and Figure 5 is a perspective view of a winding device and a gathering device.

[0029] In Figure 1A switch 1 with a housing 2 is shown in a sectional view through the housing. The switch 1 includes, for example, an input interface 4 on a first housing side 3 with a first and, for example, a second input channel 5, 6. The switch 1 includes, for example, an output interface 8 on a second housing side 7 with a first, a second, and, for example, a third output channel 9 - 11.

[0030] Within a housing 12 of the housing 2, the second input channel 6 and the third output channel 11 are, for example, formed as a single unit, e.g., continuously connected, so that the second input channel 6 and the third output channel 11 are electrically connected. The second input channel 6 is intended to be connected to a neutral conductor N of a single-phase alternating voltage.

[0031] The first input channel 5 is designed to be connected to a live conductor (phase L) of a single-phase AC voltage. Furthermore, the first input channel 5 is configured inside the housing 12, for example, such that it can be electrically connected to the first output channel 9 via a first switching contact 13 and to the second output channel 10 via a second switching contact 14. Advantageously, the two switching contacts 13 and 14 are connected to a switching element 31 of the switch 1 (see Figure 1). Figure 2) such that switching the switching element 31 moves the switching contacts 13, 14 in such a way that either an electrically conductive connection between the first input channel 5 and the first output channel 9 is closed, or an electrically conductive connection between the first input channel 5 and the second output channel 10 is closed. Preferably, the two switching contacts 13, 14 are configured such that the first output channel 9 and the second output channel 10 cannot be simultaneously electrically connected to the first input channel 5. However, it is conceivable that the two switching contacts 13, 14 are configured such that switching the switching element 31 causes the first output channel 9 and the second output channel 10 to be simultaneously available, but separate from the first input channel 5.

[0032] Figure 2 Figure 15 shows a drive system comprising a switch 1, a frequency converter 16 and a motor 17.

[0033] The frequency converter 16, for example, is designed to generate a 3-phase alternating voltage from a single-phase alternating voltage.

[0034] The frequency converter 16 comprises, for example, three inputs 19-21 on an input side 18. A first input 19 of the frequency converter 16 is, for example, electrically connected to the first output channel 9 of the switch 1. A second input 20 of the frequency converter 16 is, for example, electrically connected to the second output channel 10 of the switch 1. A third input channel 21 of the frequency converter 16 is advantageously electrically connected to the third output channel 11 of the switch 1. Furthermore, the frequency converter 16 preferably comprises three, and in particular four, outputs 23-26 on an output side 22. In an operating state of the frequency converter 16, for example, a first phase L1 of a three-phase AC voltage is present at a first output 23, a second phase L2 at a second output 24, and a third phase L3 at a third output 25.At a fourth output 26 of the frequency converter 16, for example, a neutral conductor N of the 3-phase alternating voltage is present in the operating state.

[0035] The frequency converter 16 is designed such that, depending on whether phase L of the input single-phase AC voltage is present at the first input 19 or the second input 20, the phases of the three-phase AC voltage are reversed at the outputs 23-25, thus changing the direction of rotation of a motor connectable to the frequency converter. For example, depending on the configuration of the first and second inputs 19 and 20, exactly two phases are reversed at the outputs 23-25. If, for example, the first input 19 is electrically connected to phase L of the single-phase AC voltage, then the first phase L1 is present at the first output 24, the second phase L2 at the second output 25, and the third phase L3 at the third output 26.For example, if the second input 20 is electrically connected to the phase L of the single-phase alternating voltage, then the second phase L2 is present at the first output 24, the first phase L1 at the second output 25 and the third phase L3 at the third output 26 of the three-phase current.

[0036] It is also conceivable that the frequency converter 16 has a switching and / or control device 32, which can be controlled, for example, via a control interface 33. The switching and / or control device 32 can, for example, be configured to switch the frequency converter 16, in particular to switch it off or turn it off, or to activate or deactivate it. Preferably, the switching and / or control device 32 is configured to determine and provide an operating state of the frequency converter 16 and / or to switch the frequency converter 16 depending on an operating state of the frequency converter 16. The control interface 33 of the frequency converter 16 is, for example, configured as a wired interface. However, it is also conceivable that the control interface 33 is a wireless interface, e.g., a WLAN, Bluetooth, and / or NFC interface.

[0037] The motor 17 is designed as a three-phase AC motor. For power supply, the motor 17 has, for example, four power connections 27-30. Advantageously, each of the four power connections 27-30 of the motor 17 is electrically connected to one of the four outputs 23-26 of the frequency converter 16.

[0038] In Figure 3 Ventilation device 34 is shown, which includes, among other things, a motor 17 with a frequency converter. A flap actuator 35 and / or a lifting actuator 36 can be integrated into the ventilation device (see also Figure 4 A flap device or a lifting device is, for example, in Figure 4 depicted. Figure 5 shows a winding device 37 or a gathering device 38. Reference symbol list 1 Switch 21 Entrance 2 Housing 22 Homepage 3 Case side 23 Exit 4 Input interface 24 Exit 5 Input channel 25 Exit 6 Input channel 26 Exit 7 Case side 27 power connection 8 Output interface 28 power connection 9 Output channel 29 power connection 10 Output channel 30 power connection 11 Output channel 31 Switching element 12 Case interior 32 Switching and / or control device 13 Switching contact 14 Switching contact 33 Control interface 15 drive system 34 ventilation device 16 Frequency converter 35 Flap drive 17 Motor 36 Lifting drive 36 18 Homepage 37 winding device 19 Entrance 38 Retracting device 20 Entrance

Claims

1. Motor (17), in particular geared motor, having a frequency converter (16), wherein the frequency converter (16) has a switch (1) for switching a single-phase alternating voltage, wherein the switch (1) comprises an input interface (4) which has exactly two input channels (5, 6), wherein the switch (1) comprises an output interface (8) which has exactly three output channels (9 - 11), and wherein the switch (1) has a switching element having a switching contact (13, 14), wherein switching the switching element (31) causes the switching contact (13, 14) to close an electrically conductive contact between a first input channel (5) of the two input channels (5, 6) and a first output channel (9) of the three output channels (9 - 11) or between the first input channel (5) and a second output channel (10) of the three output channels (9 - 11), wherein a second input channel (6) of the two input channels (5, 6) and a third output channel (11) of the three output channels (9 - 11) are inseparably electrically conductively connected to each other, wherein the second input channel (6) is provided for the arrangement of the neutral conductor of the single-phase alternating voltage (phase N) and wherein the first input channel (5) is provided for the arrangement of the outer conductor of the single-phase alternating voltage (phase L), wherein the frequency converter (16) is designed to generate a three-phase alternating voltage from a single-phase alternating voltage applied on the input side, wherein the frequency converter (16) has two inputs (19, 20) for one phase of a single-phase alternating voltage and three outputs (23 - 25) for three different phases of a three-phase alternating voltage, wherein the frequency converter (16) is designed in such a way that, depending on assignment of the two inputs (19, 20) to the phase of the single-phase alternating voltage, two different phases of the three-phase alternating voltage are exchanged at the outputs (23 - 25), wherein the motor (17) is designed as a three-phase alternating-current motor, wherein, depending on assignment of the two inputs (19, 20) of the frequency converter (16) and on a switching position of the switching element (31) of the switch (1), two phases of the three-phase alternating voltage are exchanged on a current-input side (27 - 30) of the motor (17) and a direction of rotation of the motor (17) is thereby specified.

2. Motor (17) according to preceding Claim 1, characterized in that the switch (1) is designed in such a way that an electrically conductive connection of an input channel (5) to an output channel (9, 10) of the switch (1) is able to be disconnected by a switching operation of the switching element (31) such that the first input channel (5) of the input interface (4) is not electrically conductively connected to the first or to the second output channel (9, 10) of the output interface (8).

3. Motor (17) to preceding Claim 1, characterized in that the switch (1) is designed in such a way that an electrically conductive connection of an input channel (5) to an output channel (9, 10) of the switch (1) is able to be disconnected by a switching operation of the switching element (31) such that the first input channel (5) of the input interface (4) is not electrically conductively connected to the first and to the second output channel (9, 10) of the output interface (8).

4. Drive system (15) having a motor (17) according to one of preceding Claims 1 to 3.

5. Ventilation device (35 - 38) having a drive system (15) according to preceding Claim 4 or a motor (17) according to one of preceding Claims 1 to 3.

6. Roll-up device (37) having a drive system (15) according to preceding Claim 4 or a motor (17) according to one of preceding Claims 1 to 3.

7. Gathering device (38) having a drive system (15) according to preceding Claim 4 or a motor (17) according to one of preceding Claims 1 to 3.

8. Lifting device (36) having a drive system (15) according to preceding Claim 4 or a motor (17) according to one of preceding Claims 1 to 3.

9. Flap device (35) having a drive system (15) according to preceding Claim 4 or a motor (17) according to one of preceding Claims 1 to 4.

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