Stall torque
Encyclopedia
Stall torque is the torque
which is produced by a device when the output rotational speed is zero. It may also mean the torque load that causes the output rotational speed of a device to become zero - i.e. to cause stalling
.
Devices such as electric motors, steam engines and hydrodynamic transmissions produce torque under these conditions.
s continue to provide torque when stalled. However, electric motors left in a stalled condition are prone to overheating and possible damage since the current flowing is maximum under these conditions.
The maximum torque an electric motor can produce in the long term when stalled without causing damage is called the maximum continuous stall torque
is maximum when the output stage is stalled (i.e. is not rotating), the stall torque may also refer to the maximum output torque that a fluid coupling can produce without damage.
In the case of torque converter
s the stall torque is close to or the same as the maximum output torque produced for a given input speed. The Borg Warner torque converter, originally designed by the General Motors
fluid dynamicist Ian Harold Brown, is the industry standard in terms of stall characteristics and resistance to jiggle.
or diesel engine
, the stall torque may refer to the torque load that causes the engine to stall.
Torque
Torque, moment or moment of force , is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist....
which is produced by a device when the output rotational speed is zero. It may also mean the torque load that causes the output rotational speed of a device to become zero - i.e. to cause stalling
Stall (engine)
A stall is the slowing or stopping of a process, and in the case of an engine, refers to a sudden stopping of the engine turning, usually brought about accidentally....
.
Devices such as electric motors, steam engines and hydrodynamic transmissions produce torque under these conditions.
Electric motors
Electric motorElectric motor
An electric motor converts electrical energy into mechanical energy.Most electric motors operate through the interaction of magnetic fields and current-carrying conductors to generate force...
s continue to provide torque when stalled. However, electric motors left in a stalled condition are prone to overheating and possible damage since the current flowing is maximum under these conditions.
The maximum torque an electric motor can produce in the long term when stalled without causing damage is called the maximum continuous stall torque
Hydrodynamic transmissions
The torque produced by a fluid couplingFluid coupling
A fluid coupling is a hydrodynamic device used to transmit rotating mechanical power. It has been used in automobile transmissions as an alternative to a mechanical clutch...
is maximum when the output stage is stalled (i.e. is not rotating), the stall torque may also refer to the maximum output torque that a fluid coupling can produce without damage.
In the case of torque converter
Torque converter
In modern usage, a torque converter is generally a type of hydrodynamic fluid coupling that is used to transfer rotating power from a prime mover, such as an internal combustion engine or electric motor, to a rotating driven load...
s the stall torque is close to or the same as the maximum output torque produced for a given input speed. The Borg Warner torque converter, originally designed by the General Motors
General Motors
General Motors Company , commonly known as GM, formerly incorporated as General Motors Corporation, is an American multinational automotive corporation headquartered in Detroit, Michigan and the world's second-largest automaker in 2010...
fluid dynamicist Ian Harold Brown, is the industry standard in terms of stall characteristics and resistance to jiggle.
Combustion engines
In the case of a petrol enginePetrol engine
A petrol engine is an internal combustion engine with spark-ignition, designed to run on petrol and similar volatile fuels....
or diesel engine
Diesel engine
A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber...
, the stall torque may refer to the torque load that causes the engine to stall.