1 2 3 - Torqeedo

Motor and
power electronics
Strong core: Torqeedo torque motors
The motor is the core of a boat drive. With its torque motors,
Torqeedo sets new standards in the areas of torque, efficiency
and power per weight and volume. The motor which equips the
Travel 801 with the effective power of a 2 HP combustion engine
only weighs 500 g and is no larger than a packet of cigarettes.
In the case of a torque motor, the objective of the design is to use
as many factors as possible to maximize the torque. Torqeedo
has uncompromisingly optimized the torque motor and, with the
introduction of synchronous motors, which come as permanent
excited magnet, electronically commutated and designed as
external rotor motors, has created true torque giants.
This motor equips the Travel 801 model with the effective
power of a 2 HP combustion engine – with a considerably
higher thrust. The motor has a stator diameter of 43 mm
and weighs 500 g. As a comparison: an equivalent-type
motor the size of a matchbox and the weight of a letter
(22 g) would suffice as the drive of a bicycle (70 W peak
power).
However, that is not all: The use of high-tech materials further
improves the performance parameters of the Torqeedo torque
motors: a Torqeedo motor, such as that used in the Travel 801
model, uses rare earth magnets instead of hexaferrites.
Altogether, it exceeds a conventional internal rotor motor by 24-
fold torque – although it is the same size. Combined with a 1:14
step-down gear, the 800-watt motor can easily drive a propeller
typically used by a 20 HP combustion engine.
The Torqeedo motors also take on a new dimension with regard
to efficiency. They experience no excitation current and brush
losses: and are equipped with additional, patented control
mechanisms, reducing losses to a minimum. The efficiency not
only ensures the efficient use of the available battery capacity
– it also prevents thermal problems. In this way, Torqeedo can
combine high performance with a small structural shape.
12 Catalogue 2007