Early 2021 I started designing a reasonably priced compact motor with a planetary output.
At every stage things just got more complicated and required another month or so of learning.
Then life started again and development slowed once more.
Stay tuned!
Thanks @DanGT86 for suggesting a new thread here in Motor Technology
My initial parallel paths / goals from 2021
Proposed Motor
Stator 110mm dia, 110mm long
NO20 (with Suralac 9000) lasercut & bonded laminations
10 pole N45SH
Continuous power 30kW @ 10,000 rpm
Peak power 50kW for a seconds
Optimised stator water cooling gallery jacket
Proposed gearbox
Gearbox lifetime - 7500 hours nominal torque
Target gear train ratio approx 6.5
No hunting teeth allowed
Difference between dominant orders in the drive system min 8 Hz
Teeth designed to minimize sliding friction and wear
Teeth contact temperature target < 110 C
Teeth geometry can be manufactured by using standard module tooling
Safety targets - root > 1.3, flank > 0.9, scuffing > 2.0
Teeth total contact ratio target 3.1
Gear geometry is designed for better noise, vibration, and harshness
Proposed mechanical system
Approx 250mm long, 130mm diameter
Under 20Kg
Proposed controller for dual motor control
Renesas RZ/T2M brain board
Dual 2 wire network (EtherCAT?) inferface TJA102A
100M Ethernet header
Isolated CAN interface ISO7721/TJA1042T
Dual motor control interface (6 PWM, 8ch analog input / 3ch delta-sigma input per motor)
Dual multi protocol encoder interface for actual wheel speed monitoring
Onboard battery mangement MAX17841
Proposed power board
No idea yet
150V mosfet candidate from the new OptiMOS™ 6 TOLx family looks compelling optimos 6
Ciss/Crss Ratio: ~300 (7500/25)
Rds(on): 2.5mΩ
Gate Charge (Qg): 105nC
Voltage Rating: 150V
Current Rating: 260A
At every stage things just got more complicated and required another month or so of learning.
Then life started again and development slowed once more.
Stay tuned!
Thanks @DanGT86 for suggesting a new thread here in Motor Technology
My initial parallel paths / goals from 2021
Proposed Motor
Stator 110mm dia, 110mm long
NO20 (with Suralac 9000) lasercut & bonded laminations
10 pole N45SH
Continuous power 30kW @ 10,000 rpm
Peak power 50kW for a seconds
Optimised stator water cooling gallery jacket
Proposed gearbox
Gearbox lifetime - 7500 hours nominal torque
Target gear train ratio approx 6.5
No hunting teeth allowed
Difference between dominant orders in the drive system min 8 Hz
Teeth designed to minimize sliding friction and wear
Teeth contact temperature target < 110 C
Teeth geometry can be manufactured by using standard module tooling
Safety targets - root > 1.3, flank > 0.9, scuffing > 2.0
Teeth total contact ratio target 3.1
Gear geometry is designed for better noise, vibration, and harshness
Proposed mechanical system
Approx 250mm long, 130mm diameter
Under 20Kg
Proposed controller for dual motor control
Renesas RZ/T2M brain board
Dual 2 wire network (EtherCAT?) inferface TJA102A
100M Ethernet header
Isolated CAN interface ISO7721/TJA1042T
Dual motor control interface (6 PWM, 8ch analog input / 3ch delta-sigma input per motor)
Dual multi protocol encoder interface for actual wheel speed monitoring
Onboard battery mangement MAX17841
Proposed power board
No idea yet
150V mosfet candidate from the new OptiMOS™ 6 TOLx family looks compelling optimos 6
Ciss/Crss Ratio: ~300 (7500/25)
Rds(on): 2.5mΩ
Gate Charge (Qg): 105nC
Voltage Rating: 150V
Current Rating: 260A
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