Energy-saving motor system capable of automatically and accurately compensating

Abstract

The utility model discloses an automatic accurate compensation energy-saving motor system, which comprises an alternating current power supply, a switch unit, a motor, a reactive compensation capacitor and a relay, the relay comprises a relay coil and a relay switch, when the relay coil is electrified, the relay switch is closed, and when the relay coil is de-electrified, the relay switch is disconnected; the AC power supply, the switch unit, the relay coil and the motor are electrically connected in sequence to form a power supply loop. The reactive compensation capacitor and the relay switch are connected in series and then connected in parallel with the AC power supply. According to the invention, the reactive compensation capacitor can be synchronously opened and closed along with the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an energy-saving motor system with automatic and precise compensation. Background Art

[0002] Reactive power compensation, referred to as reactive compensation, plays a role in improving the power factor of the power grid in the power supply system, reducing the loss of power supply transformers and transmission lines, improving power supply efficiency, and improving the power supply environment. Therefore, reactive power compensation devices are in an indispensable and very important position in the power supply system. Reasonable selection of compensation devices can minimize the loss of the power grid and improve the quality of the power grid. On the contrary, improper selection or use may cause many factors such as power supply system, voltage fluctuation, and increased harmonics.

[0003] At present, most large and medium-sized motors are equipped with reactive power compensation devices to improve the power factor of the equipment through reactive power compensation. However, it is currently impossible to accurately control the opening and closing of the reactive power compensation device, making it impossible for the reactive power compensation device to work synchronously with the motor. Utility Model Content

[0004] The present application provides an energy-saving motor system with automatic and precise compensation, which enables reactive power compensation capacitors to be turned on and off synchronously with the motor.

[0005] The energy-saving motor system with automatic precise compensation provided by the present application includes an AC power supply, a switch unit, a motor, a reactive power compensation capacitor and a relay, wherein the relay includes a relay coil and a relay switch. When the relay coil is energized, the relay switch is closed, and when the relay coil is de-energized, the relay switch is opened;

[0006] The AC power supply, the switch unit, the relay coil and the motor are electrically connected in sequence to form a power supply circuit, and the reactive power compensation capacitor and the relay switch are connected in series and then in parallel with the AC power supply.

[0007] Preferably, the energy-saving motor system also includes a control unit and a drive unit, the output end of the control unit is electrically connected to the input end of the drive unit, the output end of the drive unit is electrically connected to the control end of the switch unit, the control unit is used to send a control signal to the drive unit, and the drive unit is used to control the connection or disconnection of the switch unit according to the control signal.

[0008] Preferably, the energy-saving motor system further comprises a timing unit, which is electrically connected to an input end of the control unit, and is used for performing timing setting and sending a signal to the control unit when the set time is reached.

[0009] Preferably, the energy-saving motor system further comprises an intelligent terminal, which is wirelessly connected to the control unit and is used to send a remote control signal to the control unit.

[0010] Preferably, the energy-saving motor system further comprises a current and voltage sampling unit, which is used to collect the current and voltage of the motor and send them to the control unit.

[0011] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0012] In the energy-saving motor system of the present application, when the switch unit is turned on, the motor is powered on and working, at which time the relay coil is energized so that the relay switch is closed, thereby enabling the reactive compensation capacitor to start reactive compensation, thereby improving the power factor of the motor; and when the switch unit is disconnected, the motor stops working, at which time the relay coil loses power so that the relay switch is disconnected, thereby removing the reactive compensation capacitor. In this way, the energy-saving motor system of the present application can accurately control the opening and closing of the reactive compensation capacitor, so that the reactive compensation capacitor can work synchronously with the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 Schematic diagram of the circuit structure of the first embodiment;

[0015] Figure 2 It is a schematic diagram of the circuit structure of the second embodiment. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0017] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products, or devices.

[0018] Embodiment 1

[0019] like Figure 1 As shown, the energy-saving motor system with automatic precise compensation of this embodiment includes an AC power supply, a switch unit, a motor, a reactive power compensation capacitor and a relay. The relay includes a relay coil and a relay switch. When the relay coil is energized, the relay switch is closed. When the relay coil is de-energized, the relay switch is disconnected.

[0020] The AC power supply, the switch unit, the relay coil and the motor are electrically connected in sequence to form a power supply circuit, and the reactive power compensation capacitor and the relay switch are connected in series and then in parallel with the AC power supply.

[0021] When the switch unit is turned on, the motor is powered on and the relay coil is powered on, so that the relay switch is closed, thereby enabling the reactive compensation capacitor to start reactive compensation; and when the switch unit is turned off, the motor stops working and the relay coil is de-energized, so that the relay switch is turned off, thereby removing the reactive compensation capacitor.

[0022] Embodiment 2

[0023] like Figure 2 As shown, the energy-saving motor system of this embodiment adds a control unit, a drive unit, a timing unit, an intelligent terminal and a current and voltage sampling unit on the basis of the first embodiment. The output end of the control unit is electrically connected to the input end of the drive unit, and the output end of the drive unit is electrically connected to the control end of the switch unit. The control unit is used to send a control signal to the drive unit, and the drive unit is used to control the connection or disconnection of the switch unit according to the control signal. In this way, the on and off of the switch unit can be controlled by the control unit, and the operation is more convenient.

[0024] The timing unit is electrically connected to the input end of the control unit. The timing unit is used to perform timing setting and send a signal to the control unit when the set time is reached. In this way, the timing setting can be performed through the timing unit to connect or disconnect the switch unit at the set time.

[0025] The smart terminal is connected to the control unit by wireless communication, and the smart terminal is used to send a remote control signal to the control unit. In this way, the switch unit can be remotely controlled to be turned on or off through the smart terminal, which is more convenient to operate.

[0026] The current and voltage sampling unit is used to collect the current and voltage of the motor and send it to the control unit. In this way, the current and voltage sampling unit can monitor the working status of the motor in real time. When the current and voltage of the motor are abnormal, the control unit can disconnect the switch unit to ensure that the motor operates in a safe state.

[0027] It should be noted that the above-mentioned sequence of the embodiments of the present application is only for description and does not represent the advantages and disadvantages of the embodiments. And the above-mentioned specific embodiments of this specification are described. Other embodiments are within the scope of the attached claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0028] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

[0029] This specification and drawings are merely exemplary illustrations of the present application and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, a person skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalents, the present application intends to include these modifications and variations.

Claims

1. An automatic and precise compensation energy-saving motor system, characterized in that: It includes an AC power supply, a switch unit, a motor, a reactive power compensation capacitor and a relay, wherein the relay includes a relay coil and a relay switch. When the relay coil is energized, the relay switch is closed, and when the relay coil is de-energized, the relay switch is opened; The AC power supply, the switch unit, the relay coil and the motor are electrically connected in sequence to form a power supply circuit, and the reactive power compensation capacitor and the relay switch are connected in series and then in parallel with the AC power supply.

2. The energy-saving motor system according to claim 1, characterized in that: The energy-saving motor system also includes a control unit and a drive unit, the output end of the control unit is electrically connected to the input end of the drive unit, the output end of the drive unit is electrically connected to the control end of the switch unit, the control unit is used to send a control signal to the drive unit, and the drive unit is used to control the switch unit to be connected or disconnected according to the control signal.

3. The energy-saving motor system according to claim 2, characterized in that: The energy-saving motor system further comprises a timing unit, which is electrically connected to an input end of the control unit and is used for performing timing setting and sending a signal to the control unit when the set time is reached.

4. The energy-saving motor system according to claim 3, characterized in that: The energy-saving motor system also includes an intelligent terminal, which is wirelessly connected to the control unit and is used to send a remote control signal to the control unit.

5. The energy-saving motor system according to claim 4, characterized in that: The energy-saving motor system further comprises a current and voltage sampling unit, which is used to collect the current and voltage of the motor and send them to the control unit.

Images