44 lines
1.8 KiB
Markdown
44 lines
1.8 KiB
Markdown
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# MCPWM BLDC motor control(hall sensor feedback) Example
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This example will show you how to use MCPWM module to control bldc motor with hall sensor feedback
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The following examples uses MCPWM module to control bldc motor and vary its speed continuously
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The bldc motor used for testing this code had hall sensor capture sequence of 6-->4-->5-->1-->3-->2-->6-->4--> and so on
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IR2136 3-ph bridge driver is used for testing this example code
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User needs to make changes according to the motor and gate driver ic used
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## Step 1: Pin assignment
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* The gpio init function initializes:
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* GPIO15 is assigned as the MCPWM signal for 1H(UH)
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* GPIO02 is assigned as the MCPWM signal for 1L(UL)
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* GPIO00 is assigned as the MCPWM signal for 2H(VH)
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* GPIO04 is assigned as the MCPWM signal for 2L(VL)
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* GPIO16 is assigned as the MCPWM signal for 3H(WH)
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* GPIO17 is assigned as the MCPWM signal for 3L(WL)
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* GPIO25 is assigned as the MCPWM capture signal for Hall A
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* GPIO26 is assigned as the MCPWM capture signal for HALL B
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* GPIO27 is assigned as the MCPWM capture signal for HALL C
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## Step 2: Connection
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* Connect GPIO15 with 1H/UH of BLDC motor driver
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* Connect GPIO02 with 1L/UL of BLDC motor driver
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* Connect GPIO00 with 2H/VH of BLDC motor driver
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* Connect GPIO04 with 2L/VL of BLDC motor driver
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* Connect GPIO16 with 3H/WH of BLDC motor driver
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* Connect GPIO17 with 3L/WL of BLDC motor driver
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* Connect GPIO25 to hall sensor A output
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* Connect GPIO26 to hall sensor B output
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* Connect GPIO27 to hall sensor C output
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## Step 3: Initialize MCPWM
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* You need to set the frequency and duty cycle of MCPWM timer
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* You need to set the MCPWM channel you want to use, and bind the channel with one of the timers
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* You need to set the capture unit, for POS/NEG edge capture
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* Also reversing the hall sensor BIT weight, will make bldc motor rotate CW or CCW
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