Coreless motor 7×16 mm + 45 mm propeller
Brushed coreless motor of micro quadcopters with its propeller: the propeller loads the motor with a drag torque and produces thrust, both rising with the square of the speed (about 0.15 N at full speed on a 1S cell). Driven by a low-side MOSFET with a freewheel diode. Values from the Tronsun 0716 data sheet and the Crazyflie 2.0 system identification (Förster, ETH 2015); rotor inertia derived, inductance neglected.
Key data
- Category
- Modules
- Simulation model
- Behavioural mixed-signal model
- Manufacturer part number
- 0716 coreless (Crazyflie class)
- Reference prefix
- M
- Pins
- 2
- Land pattern
- Motor_Coreless_7mm
Simulation model
A behavioural model implements the interface of the chip (registers, protocol, timing) at its pins. The pins are connected to the analog circuit like CMOS pins.
- Model
- dc_motor
- Supply pins
- + / -
Pins 2
| Pin | Name | Use |
|---|---|---|
| + | +Passive pin | Positive terminal (+) |
| - | −Passive pin | Negative terminal (−) |
Parameters 10
loadlivein addition to friction and propeller
R3.7 V / 2.4 A stall (Tronsun 0716-Q-3)
Lnot published: neglected
keTronsun 0716-Q-3 no-load point; Bitcraze Kv 14 000 rpm/V gives 682u
tfKe · 95 mA no-load current
Jderived from the thrust step response (Förster 2015)
kfFörster 2015, eq. 3.3 / 3.4
kq0.005965 m · thrust coefficient (Förster 2015, eq. 3.5)
massBitcraze 7 mm motor 2.7 g + propeller 0.3 g; counts for the mass of its board (engine/mass.ts)
spinseen from the propeller side, for a positive voltage on +. auto: alternating around the board, the motor nearest front-right clockwise (Crazyflie pattern), so the reaction torques cancel
PCB
Motor_Coreless_7mm