Starter High Torque
Airsoft Electric Rifle - G&G GR16 A2 Carbine Airsoft Rifle
The Gr16 A2 Carbine weighs in at just under 6 pounds, making this rifle exceptionally easy to carry around the battlefield for extended periods of time. The buttstock is adjustable, allowing you to adjust the length of the rifle from 30.75 inches to 34.75 inches. This makes this airsoft electric rifle a great starter for beginners as well as the avid enthusiast.
The high capacity magazine is capable of holding up to 450 rounds of ammunition. The front sight is adjustable for elevation and the rear sight is adjustable for elevation as well as windage. It incorporates an adjustable hop up system. This will allow you to adjust for the trajectory of the ammunition so you can really dial it in.
It fires in the fully automatic as well as the semi automatic modes. And speaking of firing, this airsoft rifle will fire the .2g ammunition at a velocity of 390 feet per second, extremely fast for an electric airsoft rifle. This makes for an accurate and hard hitting gun.
The receiver is full metal and the durable ABS plastic 6 position stock is an added feature. The 8mm ball bearing gear box makes this gun exceptionally reliable and precise.
The 25,000 round per minute high torque motor spews out the ammunition at incredible rates of fire. The battery and charger is not included. This is the case for the majority of the newer airsoft electric rifles available today. This allows you to customize the gun to best suit your needs.
If you are in the market for a hard hitting gun with impeccable firing accuracy along with an incredible shot velocity, then you need to check this one out. The precision along with the reliability of an oil-less firing system will give you years of high powered shots in the field of battle.
About the Author
You can take a closer look at the G&G GR A2 Carbine Airsoft Rifle and other great airsoft electric rifles by visiting http://airsoftelectricrifle.com, Airsoft Addiction's blog dedicated to airsoft enthusiasts and the sport of airsoft.
Direct on line starter
DOL reversing starter
Most motors are reversible or, in other words, they can be run clockwise and counter-clockwise. A reversing starter is an electrical or electronic circuit that reverses the direction of a motor automatically. Logically, the circuit is composed of two DOL circuits; one for clockwise operation and the other for anti-clockwise operation. The case of three phase motor inter changing of any two phases will do the same
Safety devices within the starting circuit
These devices are used to protect the motor as well as the user of the motor being operated:
1. Overload coil The overload coil, also known as a thermal overload, is designed to open the starting circuit and thus cut the power to the motor in the event of the motor drawing too much current from the supply. The overload coil is a normally closed device which opens due to heat generated by excessive current flowing through the circuit. Thermal overloads have a small heating device that increases in temperature as the motor running current increases. A bi-metallic strip located close to the heater deflects as the heater temperature rises until it mechanically causes the device to trip and open the circuit, cutting power to the motor should it become overloaded. A thermal overload is basically a circuit breaker that will accommodate the brief high starting current of a motor whilst being able to accurately protect it from a running current overload. This is because the heater coil and the action of the bi-metallic strip introduces a time delay that affords the motor time to start and settle into normal running current without the thermal overload tripping. Thermal overloads can be manually or automatically resettable depending on their application and have an adjuster that allows them to be accurately set to the motor run current.
2. KM1 No-Volt coil The No-Volt coil serves the purpose of keeping the holding-in contactor closed, this is connected in parallel across the start switch (which is a normally open switch) in the control circuit. The no-volt coil is energized once the start switch is initiated and keeps current flowing through the control circuit. In the event of no power being supplied to the motor, the motor will stop. In order for the motor to be turned on again, the start switch must be initiated and therefore be the catalyst for closing the holding in contactor and hence energize the no-volt coil. Only once the no-volt coil is energized, will current remain flowing in the control circuit.
See also
Motor Soft Starter
Adjustable-speed drive
Variable-frequency drive
Thyristor drive
v d e
Electric motors
Broad Motor Categories
Synchronous motor AC motor DC motor
Conventional
Electric Motors
Induction Brushed DC Brushless DC Stepper Linear Unipolar Reluctance
Novel Electric Motors
Ball bearing Homopolar Piezoelectric Ultrasonic Electrostatic Switched Reluctance
Motor
Controllers
Adjustable-speed drive Amplidyne Direct torque control Direct on line starter Electronic speed control Metadyne Motor controller Variable-frequency drive Vector control Ward Leonard control Thyristor drive
See also
Barlow's Wheel Nanomotor Traction motor Lynch motor Mendocino motor Repulsion motor Inchworm motor Booster (electric power) Brush (electric) Electrical generator Alternator
External links
EduMation contains a flash animation illustrating a DOL starter of a 3-phase, induction motor using a contactor.
Categories: Electric motors | Electrical circuits | Power electronics
About the Author
I am an expert from China Manufacturers, usually analyzes all kind of industries situation, such as horse fleece blanket , quilted comforter.
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