Flytec is now listing Dr.Ecks motors plus controllers for sale.
Two flavours, 10kW (about $2,700US) and 13.5kW ($3,350US)... Then they want you to buy their controllers (10kw $1,680, 13.5kW $2,300US) and they have a separate controller "graphical interface" unit for about $670US
Their description for the 10HP unit:
The HPD 10 motor is a notably lightweight, slowly running drive, coming with a very high specific performance and paramount efficiency. The drive is designed for the relatively low operational speed of directly driven 2-blade air screws of 1.3 to 1.5 m diameter, providing the highest possible efficiency along with only slight noise level.
It is in fact a PPS device (polyphase permanently energised solenoid synchronal machine), which is operated by a tri-phase output stage DST as brushless direct current motor. The motor has a current consumption of 190A at rated power of 10kW and electric continuous operation at 52 V battery voltage. It achieves herewith a rated speed of 2100 min-1 and a torque of 42 Nm. The threshold values are approx. 220 to 230 A, according to the output stage cooling, or 50 Nm torque accelerated during take-off phase.
The motor can also be supplied for a lower specific rotation speed/voltage upon request.
Technical Data HPD 10
max. voltage : 58 V
specific idle running speed: 47 U/min/V
specific nominal load speed: 42 U/min/V
rotational speed limit value: 2500 U/min
rated current : 190 A
max. motor current: up to 230A (in accordance to cooling)
Max. stator-temperature: 100Â° C
max. rated input power: 10'000 VA
nominal effectiveness: approx. > 93%
internal resistance phase to phase: 7,8 mOhm
total inductance phase to phase: 14,5 ÂµH
Ri: 7,8 mOhm
coiling number: 36
magnetic pole numberl: 42
coil number: 18/36
constant torque: 0,22 Nm/A
Hallsensor feedback: without
vector group: delta connection
weight incl. connecting line: 3,75 kg
dimensions: dia. 21,8 cm Ã¢â‚¬â€œ length: 7,1 cm
and their "Motor Management System"
Brushless direct current motors need an electronic controller which enables the rotary motion. The three components SDC, SDI and DST constitute a unit:
the motor management system.
The setpoint for the motor voltage, as well as the enabling of the motor are effected by the operating unit SDI (Smart Drive Interface). The central control SDC (Smart Drive Control) monitors all functions and transmits the preprocessed setpoint signal to the output stage DST (frequency converter). The output stage DST is directly powered by the battery. The DST converts the direct current into a three-phase alternating current which constitutes in the stator the rotary field for the motor.
The SDC constitutes the central element of the entire motor management. The SDC monitors the motor, the battery, the electric power, the enabling signals and the system monitoring. When developing the device, the highest possible safety for motor and the user was an essential aspect. All process conditions are monitored by two independent processors. As soon as an unsafe condition appears, either caused by failure, or by incorrect operating conditions, the SDC cuts off the system. The motor is safely decelerated and then switched to currentless mode. Due to the functional principle of the brushless direct current motor it is impossible that the motor just starts to rotate.
Not sure whether the motor requires that large cooling fan or not