Datasheet

Electrical Specifications
SBL23xx Motor Controller Datasheet 15
TABLE 8.
Parameter Measure point Min Typ Max Units
Analog Input Precision Ground to Input pins 0.5 %
Analog Input Resolution Ground to Input pins 1 mV
Pulse durations Pulse inputs 20000 10 us
Pulse repeat rate Pulse inputs 50 250 Hz
Pulse Capture Resolution Pulse inputs 1 us
Frequency Capture Pulse inputs 100 2000 Hz
Note 1: Sum of all 5VOut outputs
Note 2: Outputs are Open Drain. They pull to ground when on and float when off. Load must be connected between output
and positive voltage
Operating & Timing Specifications
TABLE 9.
Parameter Measure Point Min Typ Max Units
Command Latency Command to output change 0 0.5 1 ms
PWM Frequency Motor Output 10 16 25 kHz
Closed Loop update rate Internal 1000 Hz
RS232 baud rate Rx & Tx pins 115200 (1) Bits/s
RS232 Watchdog timeout Rx pin 1 (2) 65000 ms
Note 1: 115200, 8-bit, no parity, 1 stop bit, no flow control
Note 2: May be disabled with value 0
Motor Characteristics Requirement for FOC current control
For proper FOC current control and motor operation under sinusoidal commutation, it is necessary for the
motor to meet a minimum load inductance, minimum load L/R and maximum electric operating speed require-
ments. The minimum required inductance is necessary in order to ensure low Total Harmonic Distortion (THD)
of the motor current. Furthermore, to achieve proper current response and stability, the controller’s current
loop sampling rate will limit the minimum permissible motor time constant τ=L/R and the maximum operating
electric speed.
TABLE 10.
Parameter Input DC Voltage (V) Value Units
Minimum load phase inductance (1) 12 25 uH
24 40 uH
48 60 uH
60 80 uH
Minimum load inductance/resistance ratio (1) 0 - 60 1 msec
Maximum operating electric speed (2) 0 - 60 15000 RPM
Note 1: Star connected three phase load considered. In case the motor phase inductance does not fulfill the above re-
quirements (minimum phase inductance and inductance/resistance ratio) an external AC inductor with proper inductance
value is recommended to be added.
Note 2: Maximum rotor speed is calculated from the maximum operating electric speed and pole pairs. For example, in a
motor with 4 pole pairs the maximum operating rotor speed is 15000/4 = 3750 rpm