Motor load control implementation system
By designing a motor load control implementation system and adjusting the motor load using the switching unit, the problem that the motor can only provide one load in the prior art is solved, and the cost and complexity of inverter testing is reduced.
Patent Information
- Application Number
- CN202420340099.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-23
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-02-23
AI Technical Summary
In existing frequency converter testing, the motor usually only provides one load, resulting in the need to configure multiple motors, which increases the testing cost and complexity.
Design a motor load control implementation system, including input interface, winding and switching units, switch the wiring relationship between the input interface and the coil through the switching unit, adjust the motor load to meet different test needs.
No need to equip multiple motors, significantly reducing the cost and complexity of inverter testing and improving testing flexibility and efficiency.
Smart Images
Figure CN222515259U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and in particular to a motor load control implementation system. Background Art
[0002] In the field of inverter testing, motors with different loads (voltages) are required, such as T3 (380V), T6 (660V), T11 (1140V), T33 (3300V), T60 (660V) and T100 (10000V), and the power is required to be as constant as possible. In the prior art, motors can usually only provide one load, so multiple motors need to be configured, resulting in high testing costs and complex testing processes.
[0003] As the cost of test station construction increases, factories require test tooling to be simple, durable, practical, highly functional and compatible, and to meet a variety of voltages and powers. Tooling design pursues simplicity, directness and good versatility, emphasizes the essence and function of objects, and abandons unnecessary decoration and modification. Utility Model Content
[0004] The technical problem to be solved by the embodiments of the utility model is the high testing cost of the existing frequency converter.
[0005] In order to solve the above problems, an embodiment of the utility model proposes a motor load control implementation system, including an input interface, a winding and a switching unit, the winding including a first coil and a second coil, the input interface is connected to the first coil, and the switching unit is connected to the input interface, the first coil and the second coil, wherein the wiring relationship between the input interface, the first coil and the second coil can be switched by the switching unit to adjust the load control of the motor load control implementation system.
[0006] A further technical solution is that the first coil includes a first input side and a first output side, the second coil includes a second input side and a second output side, and the switching unit includes a first contactor, a second contactor and a third contactor;
[0007] The input interface is connected to the first input side; the first contactor is connected to the second input side and the input interface respectively; the second contactor is connected to the second input side and the first output side respectively; the third contactor is connected to the first output side and the second output side respectively.
[0008] A further technical solution is that the switching unit further includes a fourth contactor and a fifth contactor;
[0009] The fourth contactor is connected to the first output side and the second input side respectively; the fifth contactor is connected to the first input side and the second output side respectively.
[0010] A further technical solution is that the switching unit further includes a sixth contactor, and the sixth contactor is respectively connected to the second output side and the wire.
[0011] A further technical solution is that the input interface, the first input side, the first output side, the second input side and the second output side all include a U phase, a V phase and a W phase; the first contactor, the second contactor, the third contactor, the fourth contactor, the fifth contactor and the sixth contactor all include three phases;
[0012] The U phase, V phase and W phase of the input interface are connected to the U phase, V phase and W phase of the first input side respectively;
[0013] The fixed ends of the three phases of the first contactor are respectively connected to the U phase, V phase and W phase of the second input side; the moving ends of the three phases of the first contactor are respectively connected to the U phase, V phase and W phase of the input interface;
[0014] The fixed ends of the three phases of the second contactor are respectively connected to the U phase, V phase and W phase of the first output side; the moving ends of the three phases of the second contactor are respectively connected to the V phase, W phase and U phase of the second input side;
[0015] The fixed ends of the three phases of the third contactor are respectively connected to the U phase, V phase and W phase of the first output side; the moving ends of the three phases of the third contactor are respectively connected to the U phase, V phase and W phase of the second output side;
[0016] The fixed ends of the three phases of the fourth contactor are respectively connected to the U phase, V phase and W phase of the first output side; the moving ends of the three phases of the fourth contactor are respectively connected to the U phase, V phase and W phase of the second input side;
[0017] The fixed ends of the three phases of the fifth contactor are respectively connected to the U phase, V phase and W phase of the first input side; the moving ends of the three phases of the fifth contactor are respectively connected to the W phase, U phase and V phase of the second output side;
[0018] The fixed ends of the three phases of the sixth contactor are respectively connected to the U phase, V phase and W phase of the second output side; the moving end wires of the three phases of the sixth contactor are short-circuited.
[0019] A further technical solution is that the switching unit further includes a first normally closed switch and a first normally open switch, the fifth contactor includes a first normally closed auxiliary contact, the sixth contactor includes a second normally closed auxiliary contact, and the first contactor or the second contactor or the third contactor includes a first normally open auxiliary contact;
[0020] The first normally closed switch is connected to the live wire, the first normally closed switch, the first normally open switch, the first normally closed auxiliary contact and the second normally closed auxiliary contact are connected in series, the first normally open auxiliary contact is connected in parallel with the first normally open switch, and the control coils of the first contactor, the second contactor and the third contactor are respectively connected to the second normally closed auxiliary contact and the neutral wire.
[0021] A further technical solution is that the switching unit further includes a second normally closed switch and a second normally open switch, the sixth contactor includes a third normally closed auxiliary contact, the fifth contactor includes a second normally open auxiliary contact, the first contactor includes a fourth normally closed auxiliary contact, the second contactor includes a fifth normally closed auxiliary contact, and the third contactor includes a sixth normally closed auxiliary contact;
[0022] The fourth normally closed auxiliary contact is connected to the live wire, the fourth normally closed auxiliary contact, the fifth normally closed auxiliary contact and the sixth normally closed auxiliary contact are connected in series; the second normally closed switch is connected to the sixth normally closed auxiliary contact, the second normally closed switch, the second normally open switch, the third normally closed auxiliary contact and the control coil of the fifth contactor are connected in series, and the control coil of the fifth contactor is connected to the neutral wire; the second normally open auxiliary contact is connected in parallel to the second normally open switch;
[0023] The control coil of the fourth contactor is connected to the sixth normally closed auxiliary contact and the neutral line respectively.
[0024] A further technical solution is that the switching unit further includes a third normally closed switch and a third normally open switch, the fifth contactor includes a seventh normally closed auxiliary contact, and the sixth contactor includes a third normally open auxiliary contact;
[0025] The third normally closed switch is connected to the sixth normally closed auxiliary contact, the third normally closed switch, the third normally open switch, the seventh normally closed auxiliary contact and the control coil of the sixth contactor are connected in series, the control coil of the sixth contactor is connected to the neutral line, and the third normally open auxiliary contact is connected in parallel with the third normally open switch.
[0026] A further technical solution is that the first coil includes a first input side and a first output side, the second coil includes a second input side and a second output side, and the switching unit includes a first single-pole double-throw switch, a second single-pole double-throw switch, and a third single-pole double-throw switch;
[0027] The input interface is connected to the first input side; the fixed side of the first single-pole double-throw switch is connected to the input interface, and the movable side of the first single-pole double-throw switch is connected to the second input side and the second output side;
[0028] The fixed side of the second single-pole double-throw switch is connected to the first output side, and the movable side of the second single-pole double-throw switch is connected to the second input side;
[0029] The fixed side of the third single-pole double-throw switch is connected to the second output side, and the movable side of the third single-pole double-throw switch is connected to the first output side and the wire.
[0030] A further technical solution is that the input interface, the first input side, the first output side, the second input side and the second output side all include a U phase, a V phase and a W phase, and the first single-pole double-throw switch, the second single-pole double-throw switch and the third single-pole double-throw switch all include three phases;
[0031] The U phase, V phase and W phase of the input interface are respectively connected to the U phase, V phase and W phase of the first input side; the fixed ends of the three phases of the first single-pole double-throw switch are respectively connected to the U phase, V phase and W phase of the input interface; the first moving ends of the three phases of the first single-pole double-throw switch are respectively connected to the U phase, V phase and W phase of the second input side; the second moving ends of the three phases of the first single-pole double-throw switch are respectively connected to the W phase, U phase and V phase of the second output side;
[0032] The fixed ends of the three phases of the second single-pole double-throw switch are respectively connected to the U phase, V phase and W phase of the first output side; the first moving ends of the three phases of the second single-pole double-throw switch are respectively connected to the U phase, V phase and W phase of the second input side, and the second moving ends of the three phases of the second single-pole double-throw switch are respectively connected to the V phase, W phase and U phase of the second input side;
[0033] The fixed ends of the three phases of the third single-pole double-throw switch are respectively connected to the U phase, V phase and W phase of the second output side; the first moving ends of the three phases of the third single-pole double-throw switch are respectively connected to the U phase, V phase and W phase of the first output side, and the second moving ends of the three phases of the third single-pole double-throw switch are short-circuited by wires.
[0034] Compared with the prior art, the technical effects achieved by the embodiments of the present invention include:
[0035] According to the technical solution of the utility model, the connection relationship between the input interface, the first coil and the second coil can be switched through the switching unit, and the load of the motor load control system can be adjusted to meet different testing requirements of the inverter, thereby eliminating the need to equip multiple motors and greatly reducing the testing cost of the inverter. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.
[0037] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0038] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.
[0039] Figure 1 A structural block diagram of a motor load control implementation system provided by an embodiment of the utility model;
[0040] Figure 2 A circuit wiring diagram of a motor load control implementation system provided by an embodiment of the utility model;
[0041] Figure 3 An equivalent circuit diagram of a double Δ connection method of a motor load control implementation system provided by an embodiment of the utility model;
[0042] Figure 4 Another equivalent circuit diagram of a double Δ connection method of a motor load control implementation system provided by an embodiment of the utility model;
[0043] Figure 5 An equivalent circuit diagram of a single Δ connection method of a motor load control implementation system provided by an embodiment of the utility model;
[0044] Figure 6 An equivalent circuit diagram of a Y-connection method of a motor load control implementation system provided by an embodiment of the utility model;
[0045] Figure 7 A circuit wiring diagram of a switching unit of a motor load control implementation system provided by an embodiment of the utility model;
[0046] Figure 8 Another circuit wiring diagram of a motor load control implementation system provided by an embodiment of the utility model.
[0047] Reference numerals
[0048] Input interface 10, winding 20, switching unit 30, first coil 21, second coil 22, first input side 211, first output side 212, second input side 221, second output side 222, first contactor KM1, second contactor KM2, third contactor KM3, fourth contactor KM4, fifth contactor KM5, sixth contactor KM6, first normally closed switch SB11, first normally open switch SB21, second normally closed switch SB12, second normally open switch SB22, first normally closed switch SB13, first normally open switch SB14, first normally closed switch SB15, first normally open switch SB16, first normally closed switch SB17, first normally closed switch SB18, first normally open switch SB19, first normally closed switch SB20, first normally closed switch SB21, first normally closed switch SB22, first normally closed switch SB23, first normally closed switch SB24, first normally open switch SB25, first normally closed switch SB26, first normally closed switch SB27, first normally closed switch SB28, first normally closed switch SB29, first normally closed switch SB30, first normally open switch SB31, first normally closed switch SB32, first normally closed switch SB33, first normally open switch SB34, first normally closed switch SB35, first normally closed switch SB36, first normally closed switch SB37, first normally open switch SB38, first normally closed switch SB39, first normally closed switch SB40, first normally closed switch SB41, first normally open switch SB42, first normally closed switch SB43, first normally closed switch SB44, first normally open switch SB45, first normally closed switch SB46 Three normally closed switches SB13, a third normally open switch SB23, a first normally closed auxiliary contact B1, a second normally closed auxiliary contact B2, a third normally closed auxiliary contact B3, a fourth normally closed auxiliary contact B4, a fifth normally closed auxiliary contact B5, a sixth normally closed auxiliary contact B6, a seventh normally closed auxiliary contact B7, a first normally open auxiliary contact K1, a second normally open auxiliary contact K2, a third normally open auxiliary contact K3, a first single-pole double-throw switch QS1, a second single-pole double-throw switch QS2 and a third single-pole double-throw switch QS3. DETAILED DESCRIPTION
[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Similar component numbers in the drawings represent similar components. Obviously, the embodiments to be described below are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0050] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.
[0051] It should also be understood that the terms used in this utility model embodiment specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model embodiments. As used in the utility model embodiment specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.
[0052] See also Figure 1-Figure 8The embodiment of the utility model proposes a motor load control implementation system, the load of the motor load control implementation system is adjustable, so as to adapt to different test requirements of the inverter. Specifically, the motor load control implementation system includes an input interface 10, a winding 20 and a switching unit 30. The specific structure is described as follows:
[0053] The input interface 10 is connected to the first coil 21 . The input interface 10 is the power supply input terminal of the motor. The input interface 10 is connected to the frequency converter during testing.
[0054] The switching unit 30 is connected to the input interface 10, the first coil 21 and the second coil 22. In the present invention, the connection relationship between the input interface 10, the first coil 21 and the second coil 22 can be switched by the switching unit 30, for example, it can be switched to a double Δ (double triangle) connection, a single Δ (single triangle) connection or a Y (star) connection, so as to adjust the load of the motor load control system and keep the power unchanged. In the embodiment of the present invention, the parameters of the first coil 21 and the second coil 22 are the same.
[0055] According to the technical solution of the utility model, the connection relationship between the input interface 10, the first coil 21 and the second coil 22 can be switched through the switching unit 30, and the load of the motor load control system can be adjusted to meet different testing requirements of the inverter, thereby eliminating the need to equip multiple motors and greatly reducing the testing cost of the inverter.
[0056] Specifically, in one embodiment, the first coil 21 includes a first input side 211 and a first output side 212, the second coil 22 includes a second input side 221 and a second output side 222, and the switching unit 30 includes a first contactor KM1, a second contactor KM2, a third contactor KM3, a fourth contactor KM4, a fifth contactor KM5, and a sixth contactor KM6;
[0057] The input interface 10 is connected to the first input side 211; the first contactor KM1 is connected to the second input side 221 and the input interface 10; the second contactor KM2 is connected to the second input side 221 and the first output side 212; the third contactor KM3 is connected to the first output side 212 and the second output side 222. The fourth contactor KM4 is connected to the first output side 212 and the second input side 221; the fifth contactor KM5 is connected to the first input side 211 and the second output side 222. The sixth contactor KM6 is connected to the second output side 222 and the wire.
[0058] In the embodiment of the utility model, when the first contactor KM1, the second contactor KM2 and the third contactor KM3 are turned on, and the fourth contactor KM4, the fifth contactor KM5 and the sixth contactor KM6 are turned off, the double Δ connection method is realized. When the fourth contactor KM4 and the fifth contactor KM5 are turned on, and the first contactor KM1, the second contactor KM2, the third contactor KM3 and the sixth contactor KM6 are turned off, the single Δ connection method is realized. When the fourth contactor KM4 and the sixth contactor KM6 are turned on, and the first contactor KM1, the second contactor KM2, the third contactor KM3 and the fifth contactor KM5 are turned off, the Y connection method is realized.
[0059] Furthermore, the motor load control implementation system is specifically a three-phase motor. Specifically, the input interface 10, the first input side 211, the first output side 212, the second input side 221 and the second output side 222 all include U phase, V phase and W phase. The first contactor KM1, the second contactor KM2, the third contactor KM3, the fourth contactor KM4, the fifth contactor KM5 and the sixth contactor KM6 all include three phases. It can be understood that each contactor corresponds to a switch, which includes a fixed end and a moving end. When the contactor is turned on, the fixed end and the moving end are turned on; when the contactor is turned off, the fixed end and the moving end are turned off. Therefore, the specific wiring method is as follows:
[0060] The U phase U, V phase V and W phase W of the input interface 10 are connected to the U phase U1, V phase V1 and W phase W1 of the first input side 211 respectively;
[0061] The fixed ends of the three phases of the first contactor KM1 are respectively connected to the U phase U2, V phase V2 and W phase W2 of the second input side 221; the moving ends of the three phases of the first contactor KM1 are respectively connected to the U phase U, V phase V and W phase W of the input interface 10;
[0062] The fixed ends of the three phases of the second contactor KM2 are respectively connected to the U phase U3, V phase V3 and W phase W3 of the first output side 212; the moving ends of the three phases of the second contactor KM2 are respectively connected to the V phase V2, W phase W2 and U phase U2 of the second input side 221;
[0063] The fixed ends of the three phases of the third contactor KM3 are respectively connected to the U phase U3, V phase V3 and W phase W3 of the first output side 212; the moving ends of the three phases of the third contactor KM3 are respectively connected to the U phase U4, V phase V4 and W phase W4 of the second output side 222;
[0064] The fixed ends of the three phases of the fourth contactor KM4 are respectively connected to the U phase U3, V phase V3 and W phase W3 of the first output side 212; the moving ends of the three phases of the fourth contactor KM4 are respectively connected to the U phase U2, V phase V2 and W phase W2 of the second input side 221;
[0065] The fixed ends of the three phases of the fifth contactor KM5 are respectively connected to the U phase U1, V phase V1 and W phase W1 of the first input side 211; the moving ends of the three phases of the fifth contactor KM5 are respectively connected to the W phase W4, U phase U4 and V phase V4 of the second output side 222;
[0066] The fixed ends of the three phases of the sixth contactor KM6 are respectively connected to the U phase U4, V phase V4 and W phase W4 of the second output side 222; the moving ends of the three phases of the sixth contactor KM6 are short-circuited by wires.
[0067] See also Figure 7 , the switching unit 30 also includes a first normally closed switch SB11, a second normally closed switch SB12, a third normally closed switch SB13, a first normally open switch SB21, a second normally open switch SB22 and a third normally open switch SB23. The fifth contactor KM5 includes a first normally closed auxiliary contact B1, the sixth contactor KM6 includes a second normally closed auxiliary contact B2, the first contactor KM1 or the second contactor KM2 or the third contactor KM3 includes a first normally open auxiliary contact K1. The sixth contactor KM6 includes a third normally closed auxiliary contact B3, the fifth contactor KM5 includes a second normally open auxiliary contact K2, the first contactor KM1 includes a fourth normally closed auxiliary contact B4, the second contactor KM2 includes a fifth normally closed auxiliary contact B5, and the third contactor KM3 includes a sixth normally closed auxiliary contact B6. The fifth contactor KM5 includes a seventh normally closed auxiliary contact B7, and the sixth contactor KM6 includes a third normally open auxiliary contact K3.
[0068] The first normally closed switch SB11 is connected to the live wire L, the first normally closed switch SB11, the first normally open switch SB21, the first normally closed auxiliary contact B1 and the second normally closed auxiliary contact B2 are connected in series, the first normally open auxiliary contact K1 is connected in parallel with the first normally open switch SB21, and the control coils of the first contactor KM1, the second contactor KM2 and the third contactor KM3 are respectively connected to the second normally closed auxiliary contact B2 and the neutral wire N.
[0069] The fourth normally closed auxiliary contact B4 is connected to the live wire, and the fourth normally closed auxiliary contact B4, the fifth normally closed auxiliary contact B5 and the sixth normally closed auxiliary contact B6 are connected in series; the second normally closed switch SB12 is connected to the sixth normally closed auxiliary contact B6, the second normally closed switch SB12, the second normally open switch SB22, the third normally closed auxiliary contact B3 and the control coil of the fifth contactor KM5 are connected in series, and the control coil of the fifth contactor KM5 is connected to the neutral wire; the second normally open auxiliary contact K2 is connected in parallel to the second normally open switch SB22;
[0070] The control coil of the fourth contactor KM4 is connected to the sixth normally closed auxiliary contact B6 and the neutral line N respectively.
[0071] The third normally closed switch SB13 is connected to the sixth normally closed auxiliary contact B6, the third normally closed switch SB13, the third normally open switch SB23, the seventh normally closed auxiliary contact B7 and the control coil of the sixth contactor KM6 are connected in series, the control coil of the sixth contactor KM6 is connected to the neutral line, and the third normally open auxiliary contact K3 is connected in parallel to the third normally open switch SB23.
[0072] Furthermore, it also includes a first indicator light H6, a second indicator light H7 and a third indicator light H8. The first indicator light H6 is connected in parallel with the third contactor KM3, the second indicator light H7 is connected in parallel with the fifth contactor KM5, and the third indicator light H8 is connected in parallel with the sixth contactor.
[0073] In this embodiment, the working principle of the switching unit 30 is as follows:
[0074] 1. Working principle of double Δ connection switching
[0075] First, make sure that all switches are in the disconnected state, press the first normally open switch SB21, and the first contactor KM1, the second contactor KM2 and the third contactor KM3 are turned on to realize the double Δ connection method. At the same time, when the first contactor KM1, the second contactor KM2 and the third contactor KM3 are turned on, the first normally open auxiliary contact K1 is turned on, so that the first contactor KM1, the second contactor KM2 and the third contactor KM3 can be maintained in the turned-on state.
[0076] When the first contactor KM1, the second contactor KM2 and the third contactor KM3 are turned on, the fourth normally closed auxiliary contact B4, the fifth normally closed auxiliary contact B5 and the sixth normally closed auxiliary contact B6 are turned off, so that the fourth contactor KM4, the fifth contactor KM5 and the sixth contactor KM6 are in the disconnected state, ensuring the safety of the circuit.
[0077] By disconnecting the first normally closed switch SB11, the first contactor KM1, the second contactor KM2 and the third contactor KM3 can be disconnected, thereby realizing the disconnection of the double Δ connection.
[0078] 2. Working principle of double Δ connection switching
[0079] First, ensure that all switches are in the off state, press the second normally open switch SB22, the fourth contactor KM4 and the fifth contactor KM5 are turned on, and the single Δ connection is realized. At the same time, when the fifth contactor KM5 is turned on, the second normally open auxiliary contact K2 is turned on, so that the conducting state of the fifth contactor KM5 can be maintained.
[0080] When the fifth contactor KM5 is turned on, the first normally closed auxiliary contact B1 and the seventh normally closed auxiliary contact B7 are turned off, so that the first contactor KM1, the second contactor KM2, the third contactor KM3 and the sixth contactor KM6 are turned off, ensuring the safety of the circuit.
[0081] By disconnecting the second normally closed switch SB12, the fifth contactor KM5 can be disconnected, thereby realizing the disconnection of the single Δ connection method.
[0082] 3. Working principle of Y connection switching
[0083] First, ensure that all switches are in the off state, press the third normally open switch SB23, the fourth contactor KM4 and the sixth contactor KM6 are turned on, and the Y connection is realized. At the same time, when the sixth contactor KM6 is turned on, the third normally open auxiliary contact K3 is turned on, so that the conducting state of the sixth contactor KM6 can be maintained.
[0084] When the sixth contactor KM6 is turned on, the second normally closed auxiliary contact B2 and the third normally closed auxiliary contact B3 are disconnected, so that the first contactor KM1, the second contactor KM2, the third contactor KM3 and the fifth contactor KM5 are disconnected, ensuring the safety of the circuit.
[0085] By disconnecting the third normally closed switch SB13, the sixth contactor KM6 is disconnected, thereby realizing the disconnection of the Y connection.
[0086] See also Figure 8 , and combined with Figure 1 as well as Figure 3-Figure 6 In one embodiment, the first coil 21 includes a first input side 211 and a first output side 212, the second coil 22 includes a second input side 221 and a second output side 222, and the switching unit 30 includes a first single-pole double-throw switch QS1, a second single-pole double-throw switch QS2, and a third single-pole double-throw switch QS3;
[0087] The input interface 10 is connected to the first input side 211; the fixed side of the first single-pole double-throw switch QS1 is connected to the input interface 10, and the movable side of the first single-pole double-throw switch QS1 is connected to the second input side 221 and the second output side 222;
[0088] The fixed side of the second single-pole double-throw switch QS2 is connected to the first output side 212, and the movable side of the second single-pole double-throw switch QS2 is connected to the second input side 221;
[0089] A fixed side of the third single-pole double-throw switch QS3 is connected to the second output side 222 , and an active side of the third single-pole double-throw switch QS3 is connected to the first output side 212 and a wire.
[0090] Further, the motor load control implementation system is specifically a three-phase motor. Specifically, the input interface 10, the first input side 211, the first output side 212, the second input side 221 and the second output side 222 all include U phase, V phase and W phase, and the first single-pole double-throw switch QS1, the second single-pole double-throw switch QS2 and the third single-pole double-throw switch QS3 all include three phases. It can be understood that one phase of a single-pole double-throw switch is a double-throw switch. Each phase includes a fixed end and two moving ends. The fixed end can be switched to different moving ends. The fixed ends of the three phases of the single-pole double-throw switch constitute its fixed side; the moving ends of the three phases of the single-pole double-throw switch constitute its active side.
[0091] The U phase U, V phase V and W phase W of the input interface 10 are respectively connected to the U phase U1, V phase V1 and W phase W1 of the first input side 211; the fixed ends of the three phases of the first single-pole double-throw switch QS1 are respectively connected to the U phase U, V phase V and W phase W of the input interface 10; the first moving ends of the three phases of the first single-pole double-throw switch QS1 are respectively connected to the U phase U2, V phase V2 and W phase W2 of the second input side 221; the second moving ends of the three phases of the first single-pole double-throw switch QS1 are respectively connected to the W phase W4, U phase U4 and V phase V4 of the second output side 222;
[0092] The fixed ends of the three phases of the second single-pole double-throw switch QS2 are respectively connected to the U phase U3, V phase V3 and W phase W3 of the first output side 212; the first moving ends of the three phases of the second single-pole double-throw switch QS2 are respectively connected to the U phase U2, V phase V2 and W phase W2 of the second input side 221, and the second moving ends of the three phases of the second single-pole double-throw switch QS2 are respectively connected to the V phase V2, W phase W2 and U phase U2 of the second input side 221;
[0093] The fixed ends of the three phases of the third single-pole double-throw switch QS3 are respectively connected to the U phase U4, V phase V4 and W phase W4 of the second output side 222; the first moving ends of the three phases of the third single-pole double-throw switch QS3 are respectively connected to the U phase U3, V phase V3 and W phase W3 of the first output side 212, and the second moving ends of the three phases of the third single-pole double-throw switch QS3 are short-circuited by wires.
[0094] In this embodiment, the working principle of the switching unit 30 is as follows:
[0095] 1. Working principle of double Δ connection switching
[0096] The first single-pole double-throw switch QS1 is closed to the left end, and the second single-pole double-throw switch QS2 and the third single-pole double-throw switch QS3 are closed to the right end, thereby realizing a double Δ connection.
[0097] 2. Working principle of single Δ connection switching
[0098] The second single-pole double-throw switch QS2 is closed to the left end, the first single-pole double-throw switch QS1 is closed to the right end, and the third single-pole double-throw switch QS3 is opened, thereby realizing a single Δ connection.
[0099] 3. Working principle of Y connection switching
[0100] The second single-pole double-throw switch QS2 and the third single-pole double-throw switch QS3 are closed to the left end, and the first single-pole double-throw switch QS1 is opened, thereby realizing a Y connection.
[0101] In the embodiment of the utility model, the switching unit 30 is arranged in a cabinet, the cabinet is provided with a wire outlet, and a wire protection sleeve is arranged in the wire outlet. The cabinet is provided with a cabinet door, and the cabinet door is fixed by a door lock or screws for easy wiring. An angle steel base is installed at the bottom of the cabinet, and a hole is opened according to the opening of a manual forklift for easy movement.
[0102] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0103] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0104] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0105] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0106] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0107] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.
[0108] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.
[0109] The above is a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A motor load control implementation system, characterized in that: It includes an input interface, a winding and a switching unit, the winding includes a first coil and a second coil, the input interface is connected to the first coil, and the switching unit is connected to the input interface, the first coil and the second coil, wherein the connection relationship between the input interface, the first coil and the second coil can be switched by the switching unit to adjust the motor load control to realize the load control of the system.
2. The motor load control implementation system according to claim 1, characterized in that: The first coil includes a first input side and a first output side, the second coil includes a second input side and a second output side, and the switching unit includes a first contactor, a second contactor and a third contactor; The input interface is connected to the first input side; The first contactor is connected to the second input side and the input interface respectively; The second contactor is connected to the second input side and the first output side respectively; The third contactor is connected to the first output side and the second output side respectively.
3. The motor load control implementation system according to claim 2, characterized in that: The switching unit further includes a fourth contactor and a fifth contactor; The fourth contactor is connected to the first output side and the second input side respectively; the fifth contactor is connected to the first input side and the second output side respectively.
4. The motor load control implementation system according to claim 3, characterized in that: The switching unit further includes a sixth contactor, and the sixth contactor is respectively connected to the second output side and the wire.
5. The motor load control implementation system according to claim 4, characterized in that: The input interface, the first input side, the first output side, the second input side and the second output side all include a U phase, a V phase and a W phase; the first contactor, the second contactor, the third contactor, the fourth contactor, the fifth contactor and the sixth contactor all include three phases; The U phase, V phase and W phase of the input interface are connected to the U phase, V phase and W phase of the first input side respectively; The fixed ends of the three phases of the first contactor are respectively connected to the U phase, V phase and W phase of the second input side; the moving ends of the three phases of the first contactor are respectively connected to the U phase, V phase and W phase of the input interface; The fixed ends of the three phases of the second contactor are respectively connected to the U phase, V phase and W phase of the first output side; the moving ends of the three phases of the second contactor are respectively connected to the V phase, W phase and U phase of the second input side; The fixed ends of the three phases of the third contactor are respectively connected to the U phase, V phase and W phase of the first output side; the moving ends of the three phases of the third contactor are respectively connected to the U phase, V phase and W phase of the second output side; The fixed ends of the three phases of the fourth contactor are respectively connected to the U phase, V phase and W phase of the first output side; the moving ends of the three phases of the fourth contactor are respectively connected to the U phase, V phase and W phase of the second input side; The fixed ends of the three phases of the fifth contactor are respectively connected to the U phase, V phase and W phase of the first input side; the moving ends of the three phases of the fifth contactor are respectively connected to the W phase, U phase and V phase of the second output side; The fixed ends of the three phases of the sixth contactor are respectively connected to the U phase, V phase and W phase of the second output side; the moving end wires of the three phases of the sixth contactor are short-circuited.
6. The motor load control implementation system according to claim 4, characterized in that: The switching unit further includes a first normally closed switch and a first normally open switch, the fifth contactor includes a first normally closed auxiliary contact, the sixth contactor includes a second normally closed auxiliary contact, and the first contactor or the second contactor or the third contactor includes a first normally open auxiliary contact; The first normally closed switch is connected to the live wire, the first normally closed switch, the first normally open switch, the first normally closed auxiliary contact and the second normally closed auxiliary contact are connected in series, the first normally open auxiliary contact is connected in parallel with the first normally open switch, and the control coils of the first contactor, the second contactor and the third contactor are respectively connected to the second normally closed auxiliary contact and the neutral wire.
7. The motor load control implementation system according to claim 6, characterized in that: The switching unit further includes a second normally closed switch and a second normally open switch, the sixth contactor includes a third normally closed auxiliary contact, the fifth contactor includes a second normally open auxiliary contact, the first contactor includes a fourth normally closed auxiliary contact, the second contactor includes a fifth normally closed auxiliary contact, and the third contactor includes a sixth normally closed auxiliary contact; The fourth normally closed auxiliary contact is connected to the live wire, and the fourth normally closed auxiliary contact, the fifth normally closed auxiliary contact and the sixth normally closed auxiliary contact are connected in series; the second normally closed switch is connected to the sixth normally closed auxiliary contact, the second normally closed switch, the second normally open switch, the third normally closed auxiliary contact and the control coil of the fifth contactor are connected in series, and the control coil of the fifth contactor is connected to the neutral wire; The second normally open auxiliary contact is connected in parallel with the second normally open switch; The control coil of the fourth contactor is connected to the sixth normally closed auxiliary contact and the neutral line respectively.
8. The motor load control implementation system according to claim 7, characterized in that: The switching unit further includes a third normally closed switch and a third normally open switch, the fifth contactor includes a seventh normally closed auxiliary contact, and the sixth contactor includes a third normally open auxiliary contact; The third normally closed switch is connected to the sixth normally closed auxiliary contact, the third normally closed switch, the third normally open switch, the seventh normally closed auxiliary contact and the control coil of the sixth contactor are connected in series, the control coil of the sixth contactor is connected to the neutral line, and the third normally open auxiliary contact is connected in parallel with the third normally open switch.
9. The motor load control implementation system according to claim 1, characterized in that: The first coil includes a first input side and a first output side, the second coil includes a second input side and a second output side, and the switching unit includes a first single-pole double-throw switch, a second single-pole double-throw switch, and a third single-pole double-throw switch; The input interface is connected to the first input side; the fixed side of the first single-pole double-throw switch is connected to the input interface, and the movable side of the first single-pole double-throw switch is connected to the second input side and the second output side; The fixed side of the second single-pole double-throw switch is connected to the first output side, and the movable side of the second single-pole double-throw switch is connected to the second input side; The fixed side of the third single-pole double-throw switch is connected to the second output side, and the movable side of the third single-pole double-throw switch is connected to the first output side and the wire.
10. The motor load control implementation system according to claim 9, characterized in that: The input interface, the first input side, the first output side, the second input side and the second output side all include a U phase, a V phase and a W phase, and the first single-pole double-throw switch, the second single-pole double-throw switch and the third single-pole double-throw switch all include three phases; The U phase, V phase and W phase of the input interface are respectively connected to the U phase, V phase and W phase of the first input side; the fixed ends of the three phases of the first single-pole double-throw switch are respectively connected to the U phase, V phase and W phase of the input interface; the first moving ends of the three phases of the first single-pole double-throw switch are respectively connected to the U phase, V phase and W phase of the second input side; the second moving ends of the three phases of the first single-pole double-throw switch are respectively connected to the W phase, U phase and V phase of the second output side; The fixed ends of the three phases of the second single-pole double-throw switch are respectively connected to the U phase, V phase and W phase of the first output side; the first moving ends of the three phases of the second single-pole double-throw switch are respectively connected to the U phase, V phase and W phase of the second input side, and the second moving ends of the three phases of the second single-pole double-throw switch are respectively connected to the V phase, W phase and U phase of the second input side; The fixed ends of the three phases of the third single-pole double-throw switch are respectively connected to the U phase, V phase and W phase of the second output side; the first moving ends of the three phases of the third single-pole double-throw switch are respectively connected to the U phase, V phase and W phase of the first output side, and the second moving ends of the three phases of the third single-pole double-throw switch are short-circuited by wires.