Motor Starter Explained | Motor Starter Types скачать в хорошем качестве

Motor Starter Explained | Motor Starter Types

▶ C'mon over to https://realpars.com where you can learn PLC programming faster and easier than you ever thought possible! ============================= ▶ Check out the full blog post over at https://realpars.com/motor-starter/ ============================= ⌚Timestamps: 00:00 - Intro 00:43 - Motor starter types 01:39 - 1) FVNR 02:13 - 2) FVR 02:55 - 3) Reduced voltage 03:26 - 4) Multi-speed 03:49 - 1) Manual motor starting 04:10 - 2) Magnetic 04:36 - 3) Auto-transformer 05:20 - 4) Star-delta 05:55 - 5) Soft-starter 06:15 - 6) VFD ============================= Most digital outputs on control systems operate on 24 volt DC or 120 volt AC. So how do we start and stop three-phase, 480 volt AC industrial motors? The simple answer is by using a motor starter. All motor controllers are designed to keep the motor from being energized until the controller is told to activate. Once activated, current can pass to the motor, which energizes the motor windings and starts motor rotation. Motor controllers are also referred to as motor starters. These devices are most often offered in a single unit with circuit disconnecting means, a contactor or other type of motor actuator, circuit overload protection, and motor overload protection. Motor Controllers can be grouped by starting method and by starter type. 1) Full Voltage, Non-Reversing (FVNR) The first starting type is the Full Voltage, Non-Reversing motor controller. As the name implies, when the controller’s single contactor actuates, this motor controller type, also known as FVNR, allows the full line voltage to be applied to the motor. 2) Full voltage reversing In a Full Voltage Reversing motor controller, the controller has two separate actuating states: – One to operate the motor in the forward direction, and – One state to allow the motor to operate in the reverse direction. This is accomplished by adding a second contactor. – The forward contactor acts the same as in the FVNR, and – The reverse contactor swaps the position of two of the phases. 3) Reduced voltage The third type of motor starting method is called reduced voltage starting. Large motors can have a very high starting current that may be harmful to the motor or the motor controller itself. 4) Multi-speed The last type of motor starting method is multi-speed. Multi-speed motor controllers use solid-state or transforming means to allow motors to be controlled at different speeds. Two of these methods, Variable Speed Drive and 2-speed control will be described later. Now that we have described the four major categories of the motor controller by starting method, we will now describe the six major motor starter types. 1) Manual The first is manual motor actuation, which requires an operator to switch the motor on and off. Due to safety considerations, manual motor starting is limited to the motor of 10 horsepower or less. They can be used on single or three-phase applications. 2) Magnetic Magnetic motor starters, or direct online starters, are the most common single-speed starter type. For magnetic starters, a pushbutton or a selector switch connected to a PLC digital input is used to activate a PLC digital output. The PLC output will pull in a coil that magnetically holds the starter contacts closed, allowing current to pass to the motor. Magnetic motor starters are used with FVNR and full-voltage reversible motor controllers. 3) Auto-transformer Auto-transformer motor starters are commonly used in reduced-voltage starting applications, especially with large motors. 4) Star-delta http://bit.ly/3pAPSyq Star-delta reduced voltage motor starting is related to auto-transformer starting in that three separate contactors are used in the motor control scheme. 5) Soft-starter Soft-starters are another method used for limiting starting current. Soft-starters use solid-state electronics to limit the startup voltage and current. A soft-starter allows the voltage to gradually increase during motor startup. This allows the motor to slowly accelerate & gain speed in a controlled fashion. 6) Variable frequency drive (VFD) A variable frequency drive, or VFD, is similar to a soft-starter but allows the speed of the motor to be varied by varying the frequency of the output to the motor. ============================= Missed our most recent videos? Watch them here: https://realpars.com/omron-plc/ https://realpars.com/plc-output https://realpars.com/pid-tuning/ ============================= To stay up to date with our last videos and more lessons, make sure to subscribe to this YouTube channel: http://bit.ly/realpars ============================= TWEET THIS VIDEO https://ctt.ac/t0Pc1 ============================= Follow us on Facebook:   / therealpars   Follow us on Twitter:   / realpars   Follow us on LinkedIn   / realpars   Follow us on Instagram   / realparsdotcom   #RealPars #industry #MotorStarter