Stability Analysis and Design of a Nonlinear Controller for Hot Rolling Coiler

Table 2

Physical and simulation parameters for controller and inverter.

ohm	Rectifier snubber resistance	0.001
nF	Rectifier snubber capacitance	20
ohm	Diode resistance (on state)	0.001
V	Diode forward voltage	1.3
mF	Bus capacitance	2
ohm	Braking chopper resistance	8.2
Hz	Braking chopper frequency	5000
V	Braking chopper activation voltage	400
V	Braking chopper shutdown voltage	380
ohm	Inverter resistance (on state)	0.001
V	Inverter forward voltage	0.82
ms	Inverter turn-off fall time	1000
ms	Inverter turn-off tail time	2000
F	Snubber capacitance	Inf
rpm	Speed controller acceleration/deceleration	±2000
—	Proportional gain	5
—	Integral gain	10
Hz	Speed cutoff frequency	100
ms	Speed controller sampling time	0.1
N⋅m	Torque output limit	±5500
Wb	Initial motor flux	0.31
Wb	Flux controller limit	±2
kHz	Maximum switching frequency	20