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SLLSFV1 March 2025 MCF8329A-Q1

PRODUCTION DATA

封裝選項

機械數(shù)據(jù) (封裝 | 引腳)

RRY|32
- MPQF713A

散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)

RRY|32
- QFND763

訂購信息

sllsfv1_oa

6.3.13.3 Motor Back-EMF constant

The back-EMF constant describes the motor phase-to-neutral back-EMF voltage as a function of the motor speed. For a wye-connected motor, the motor BEMF constant refers to the BEMF as a function of time from the phase output to the center tap, Kt_{PH_N} (denoted as Kt_{PH_N} in Figure 6-34). For a delta-connected motor, the motor BEMF constant refers to the equivalent phase to center tap in the wye configuration in Figure 6-34.

Figure 6-34 Motor back-EMF constant

For both the delta-connected motor and the wye-connected motor, the easy way to get the equivalent Kt_{PH_N} is to measure the peak value of BEMF on scope for one electrical cycle between two phase terminals (E_PH), and then multiply by time duration of one electrical cycle and in order to convert from phase-to-phase to phase-to-neutral divide by sqrt(3) as shown in Equation 12 .

Equation 12.

{K t}_{P H_N} = {\frac{1}{\sqrt{3}} \times E_{P H} \times t_{E}}_{}

Configure the motor BEMF constant (Kt_{PH_N}) to a nearest value from Table 6-4.

Table 6-4 Motor BEMF constant Look-Up Table

MOTOR_BEMF_CONST (HEX)	Kt_{PH_N} (mV/Hz)	MOTOR_BEMF_CONST (HEX)	Kt_{PH_N} (mV/Hz)	MOTOR_BEMF_CONST (HEX)	Kt_{PH_N} (mV/Hz)	MOTOR_BEMF_CONST (HEX)	Kt_{PH_N} (mV/Hz)
0x00	Self Measurement (see Motor Parameter Extraction Tool (MPET))	0x40	14.5	0x80	46.5	0xC0	210
0x01	0.6	0x41	15.0	0x81	47.0	0xC1	220
0x02	0.7	0x42	15.5	0x82	47.5	0xC2	230
0x03	0.8	0x43	16.0	0x83	48.0	0xC3	240
0x04	0.9	0x44	16.5	0x84	48.5	0xC4	250
0x05	1.0	0x45	17.0	0x85	49.0	0xC5	260
0x06	1.1	0x46	17.5	0x86	49.5	0xC6	270
0x07	1.2	0x47	18.0	0x87	50.0	0xC7	280
0x08	1.3	0x48	18.5	0x88	51	0xC8	290
0x09	1.4	0x49	19.0	0x89	52	0xC9	300
0x0A	1.5	0x4A	19.5	0x8A	53	0xCA	320
0x0B	1.6	0x4B	20.0	0x8B	54	0xCB	340
0x0C	1.7	0x4C	20.5	0x8C	55	0xCC	360
0x0D	1.8	0x4D	21.0	0x8D	56	0xCD	380
0x0E	1.9	0x4E	21.5	0x8E	57	0xCE	400
0x0F	2.0	0x4F	22.0	0x8F	58	0xCF	420
0x10	2.2	0x50	22.5	0x90	59	0xD0	440
0x11	2.4	0x51	23.0	0x91	60	0xD1	460
0x12	2.6	0x52	23.5	0x92	61	0xD2	480
0x13	2.8	0x53	24.0	0x93	62	0xD3	500
0x14	3.0	0x54	24.5	0x94	63	0xD4	520
0x15	3.2	0x55	25.0	0x95	64	0xD5	540
0x16	3.4	0x56	25.5	0x96	65	0xD6	560
0x17	3.6	0x57	26.0	0x97	66	0xD7	580
0x18	3.8	0x58	26.5	0x98	67	0xD8	600
0x19	4.0	0x59	27.0	0x99	68	0xD9	620
0x1A	4.2	0x5A	27.5	0x9A	69	0xDA	640
0x1B	4.4	0x5B	28.0	0x9B	70	0xDB	660
0x1C	4.6	0x5C	28.5	0x9C	72	0xDC	680
0x1D	4.8	0x5D	29.0	0x9D	74	0xDD	700
0x1E	5.0	0x5E	29.5	0x9E	76	0xDE	720
0x1F	5.2	0x5F	30.0	0x9F	78	0xDF	740
0x20	5.4	0x60	30.5	0xA0	80	0xE0	760
0x21	5.6	0x61	31.0	0xA1	82	0xE1	780
0x22	5.8	0x62	31.5	0xA2	84	0xE2	800
0x23	6.0	0x63	32.0	0xA3	86	0xE3	820
0x24	6.2	0x64	32.5	0xA4	88	0xE4	840
0x25	6.4	0x65	33.0	0xA5	90	0xE5	860
0x26	6.6	0x66	33.5	0xA6	92	0xE6	880
0x27	6.8	0x67	34.0	0xA7	94	0xE7	900
0x28	7.0	0x68	34.5	0xA8	96	0xE8	920
0x29	7.2	0x69	35.0	0xA9	98	0xE9	940
0x2A	7.4	0x6A	35.5	0xAA	100	0xEA	960
0x2B	7.6	0x6B	36.0	0xAB	105	0xEB	980
0x2C	7.8	0x6C	36.5	0xAC	110	0xEC	1000
0x2D	8.0	0x6D	37.0	0xAD	115	0xED	1050
0x2E	8.2	0x6E	37.5	0xAE	120	0xEE	1100
0x2F	8.4	0x6F	38.0	0xAF	125	0xEF	1150
0x30	8.6	0x70	38.5	0xB0	130	0xF0	1200
0x31	8.8	0x71	39.0	0xB1	135	0xF1	1250
0x32	9.0	0x72	39.5	0xB2	140	0xF2	1300
0x33	9.2	0x73	40.0	0xB3	145	0xF3	1350
0x34	9.4	0x74	40.5	0xB4	150	0xF4	1400
0x35	9.6	0x75	41.0	0xB5	155	0xF5	1450
0x36	9.8	0x76	41.5	0xB6	160	0xF6	1500
0x37	10.0	0x77	42.0	0xB7	165	0xF7	1550
0x38	10.5	0x78	42.5	0xB8	170	0xF8	1600
0x39	11.0	0x79	43.0	0xB9	175	0xF9	1650
0x3A	11.5	0x7A	43.5	0xBA	180	0xFA	1700
0x3B	12.0	0x7B	44.0	0xBB	185	0xFB	1750
0x3C	12.5	0x7C	44.5	0xBC	190	0xFC	1800
0x3D	13.0	0x7D	45.0	0xBD	195	0xFD	1850
0x3E	13.5	0x7E	45.5	0xBE	200	0xFE	1900
0x3F	14.0	0x7F	46.0	0xBF	205	0xFF	2000