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Friction surfaces of pumping electro-magnetic brake

1. the Frictional brakes are the most common and widely distributed "shoe" or "pad" the brakes, using explicit wear surface and hydrodynamic brakes, such as parachutes, which uses a working fluid friction and do not specifically wear. Generally, the term "friction brake" is used as a pad/shoe brakes and excludes the hydrodynamic brakes, even though the hydrodynamic brakes friction.
The friction brakes (pad/shoe) are often revolve around the equipment in place on the pad and rotating the wear surface. The general assemblies are shoes that rub on the outside of a rotating drum, such as a contract, the band brake; only the rotating drum shoes that extend to rub the inside of the drum, commonly called the "drum brake", even though other drum configurations are possible; and pillows that touch of a rotating disk, commonly called "disc brake". Brake specifications are often used, but less. For example, PCC trailer brakes are flat in the shoe, which is attached to a rail on the electromagnet; Murphy brake squeezes the rotating drum and Ausco Lambert-disc brake uses a hollow plate (two parallel disk structural bridge) shoes that sit on the disc surfaces and expand laterally.2. Pumping brakes are often used when the pump is already part of the machine. For example, the internal combustion engine piston-engine has stopped fuel supply and creates internal pumping losses of motor brake. Some engines use the valve in the bypass called the Jake brake greatly increase the pumping losses. Pumping the brakes to dump the energy as heat or pressure in the tank, which loads the regenerative brakes of is called the pressure of the battery.3. the electromagnetic brakes are also used often, in which the electric motor is already part of the machine. For example, many hybrid gasoline/electric vehicles use electric motor generator electric batteries and regenerative braking. Some of the diesel/electric railroad locomotives use an electric motor to produce electricity, which is then posted in the resistance to the Bank and dumped as heat. Some vehicles, such as some of the transit buses does not have an engine, but uses another "retarder" brake, which is effectively a generator internal short circuit. Eddy current brakes the brakes are associated with such, and electromechanical brakes, (which, in fact, are magnetically driven friction brakes, but nowadays are often referred to as "electro-magnetic brakes" as well).